Being a huge fan of Zoro I have come up with one plausible theory.
Enjoy the read.

Zoro is holding one of the cursed sword the Kitetsu.
What does a Cursed sword mean ?
A cursed sword’s are swords in general which is not different from a normal sword,in terms of physical look.
But unlike normal swords which are mere tools,these sword posses spirit or a part of spirit,now not every swords having a spirit is cursed.
Cursed swords have spirit of demonic or evil nature and some also contains restriction which might cause its wielder harm.
As we all know Swords are made by skillfully swords maker.
If you guys notice not only in OP but other series also in real world Mythology Cursed swords are generally created by skilled and famous swords maker.
Making a sword requires lot of dedication,hardworking and spirit of the creator.Wait a sec !!
Did I just say spirit ??
Hmm yes spirit,the intent at which and for which the sword was made.
A bad intention or a violent intention will seal a demon spirit inside it.Seal doesn’t mean its sealed by some method its just that the demon spirit has given it a part of spirit for the intention of the swordmaker and give it power.
Now interms of Kitetsu’s swords its being called blood thirsty means that these swords were made with an intent to kill no matter who it is.
So once a swordsman have the sword with them,the sword will try to control them and when they can’t meet the requirement of the Sword the demon spirit inside it will bring them harm.
Zoro’s awakening.
Now Zoro is having one of the kitetsu,

Now here if you take a closer look at the sword,which Zoro used to attack Kuma at the last moment was Kitetsu,is it just a coincidence ?? That when Zoro was helpless he couldnt do much the last attack he used on Kuma,he was wielding Kitetsu.
Is it just a coincidence that Zoro used Asura after getting Shandai.

Now if you look at the part where Zoro says Demon Spirit !! “Kyuutouryuu ASURA”,here also if we recall Zoro has used all his attack and was having difficulty handling Kaku also time was running out,Kaku said something about Robin and something happened the Demonic Aura.

What i mean is Zoro has subconsciously asked for the power of the cursed sword couple of times.
What happened in 2 yrs of training with Mihawk ??
Zoro’s training made him a better swordsman but the main development was controlling the cursed sword.How he did it ??
Two possibilities.
1.Zoro said he knew the sword is cursed the moment he touched it.Which makes me believe the spirit inside the sword tried controlling Zoro but because as we all know Zoro has exceptional will power,the spirit couldnt do anything.But when Zoro gets weaker by getting beaten or suffers alot,it still tries to do it and Zoro awakens the true power of kitetsu in desperate situation.With his subsequent training with Mihawk i believe Mihawk had set some challenge for him for his final course or say as a test.Where Zoro awakened the true power of Kitetsu,now I believe just like Luffy self training of Six Months,Zoro did something similiar to understand the spirit of Kitetsu.And hence he cut his left eye to keep it closereason being Zoro uses his left hand to wield Kitetsu.
Blind with one eye of the side in which he weilds his Kitetsu kind of helps him ignore the sword while fighting,
and in a way sealing the blood thirsty nature of the sword.That way it will just be a normal Katana when Zoro is using it.
2. Second Possibility is Zoro wants to be WGS but without any help like DF or any special power,he believes in his own hardship,so when he awakened the Asura form,Mihawk might have noticed something unnatural in Zoro’s fight,And he explained to him about it,hence sealing it in his left eye only to open it when in dire situation.
But Mihawk helped Zoro sealing it by keeping TWO RULES.
1.Zoro will only awaken it when he is not fighting for his cause that is to become WGS.
2.Zoro will only awaken it as a last resort when everything fails.
by setting these rules the spirit was sealed.

So next time if we see Zoro putting his Bandana and opening his left eye, Asura is coming back.
Now people who think Zoro’s left eye is just an injury.
Have you noticed the Confidence level in Zoro after TS,
“Over the nine mountains and across the eight seas.over this earthly realm, thers’s nothing i cannot cut”-Zoro.

And is it just a coincidence that the sword shown here is Kitetsu,the dendrils are coming out of it,Its not CoA leaking or any kind of effect its the resistive nature of Kitetsu which is being engulfed by Zoro’s strong will or CoA.

*Theory by Zorro6

Here’s a quick snap theory I made up on the spot with regards to Eustass Kids usage of his Devil Fruit powers.

So, to a lot of people Kids fruit is unclear as to exactly what it is. Some people say it’s a simple Magnetic fruit, given his ability to attract metal objects and compile them into masses such as gigantic hands to rival Luffy in Gear Third. However, this was not Kids only usage. He also uses a technique called Repel and even created a current of electricity running through his giant mechanic arms. This leads me to believe he is an Electro-Magnet Man

He’s probably got the Electrode Electrode Fruit, otherwise known as the Denki Denki no Mi

What does this mean? It means he can repel and attract objects and manipulate electrical currents and magnetic fields.

His awakening or future abilities:

1-Everything has a Magnetic field. Kidd could basically replicate Shiki and control anything he wanted to, it’s possible he could reach a level where he turns Islands over or levitates them/throws them around

2-Shifting Magnetic Fields will allow Kid to create natural disasters like earthquakes and Tsunami’s, similar to Whitebeard

3-Kid could electrocute anyone in contact with metal, remotely. Like Enel, although unlike Enel, he is not producing electricity, he is simply shifting a Magnetic Field

4-Using Magnetic pulses he could cut off communication lines for Den Den Mushi, or disable electrical equipment and weapons

Another power:
Metal benders in Avatar, the Legend of Korra are actually manipulating the bits of earth and other compounds in metal. Reverse this, and we see it’s possible for Kid to Earthbend or perform something similar. This allows Kids powers to remain effective even where there is little metal, by manipulating compounds of Metals and Ores in rock. Like I mentioned earlier, imagine him levitating Islands or turning them over like Shiki

This is also a reference to Captain William Kidd’s buried treasure consisting of Gold, Silver and Platinum objects, these are all found in Ores in rock. William Kidd is the man whom Oda used as inspiration for Eustass.

Conclusion:
Kidd’s awakening (or current) DF powers will allow him to manipulate Magnetic fields, causing widespread destruction. He will also be able to manipulate Ore-rich Earth.

*Theory by L o g i a

In the new world their hasn’t been much that has challenged Zoro , neither the 8 sword wielding FishMan or the DD family Elite Pica, he cut down a mountain sized behemoth in a single slash of his swords only causing him to break a little sweat. We all know and believe that both Zoro and Sanji have yet to show their true potential and we all cant wait until that happens.

But Ive been wondering about Zoro lately as a few of the things he has done and said in the new world has made me wonder just how far has he increased he strength and what new abilities has he mastered. Now there are multiple theories on what happened to Zoro’s left eye and the belief that a malicious demon was behind his injury and I do agree that theory is true but slightly different to the general idea that has been thrown around on the forums. What I believe Zoro did in his 2 years training was not just pushing his physical limits but master what was lying dormant inside of him. Let me list what I believe Zoro has learned and then I will provide evidence and a scenario to back those predictions.

1) Skilled in all 2 types of Haki and learned of his own CoC potential
We has already seen Zoro CoO and CoA in the series, his actions in Dressrosa show him finding Pica with CoO and cutting him with blades infused with CoA, but he also learned that he has CoC whilst his training and meditation. One very subtle but obvious hint was his statement once Luffy showed his CoC in-front of the Straw Hats for the first time. After Sanji says that Luffy must be using Conquerers Haki, Zoro swiftly replies that he would expect no less from the captain of the crew. Now Zoro has strong beliefs in what aspects define a captain and the respect that he should always have from his subordinates, his actions in Water 7 regrading Ussop’s temporary disassociation and the Going Merry end strongly support this claim. So his statement suggests that Luffy should have that ability or he would be an unfit captain, now Zoro could only make such a claim if someone else in the crew also had CoC making them superior to Luffy in potential and that person must be Zoro himself. Now he may not have awakened the ability to use it, a dire situation is required to do so examples being both Luffy’s and Ace’s first time using CoC, but he learnt that he has such a strength within him from the demon in the Sandai Kitetsu. Now why would such a blade agree to Zoro using it when all the previous owners of the blade died in battle? because of Zoros animalistic nature, so no swordsman who wielded it before Zoro had bloodlust? Id disagree with that any day but Zoro having the potential to unlock CoC would definately intrigue a demon.

2)Zoro’s eye was lost whilst he made a deal with the demon/cursed demon that resides with the Sandai Kitetsu

Whilst Zoro meditated with his swords to master CoA with his blades before he could continue his training with Mihawk he encountered a problem. He could perfectly turn the Wado Ichimonji and the Shusui into completely black blades that were as strong as his will but the Sandai Kitetsu was not abiding by his will flickered in between states of being normal and black blade. Now knowing that he could not further his training with Mihawk and have his beloved Sake returned until he had completed this task Zoro went into deep concentration and meditation over the blade and was greeted with the demon that resided within the blade. Now in order to have complete control over the blade Zoro must have had to make a blood sacrifice to the demon to create a blood contract between them allowing Zoro free control over Sandai Kitetsu and access to the demon strength if needed. Zoro would not hesitate on such an offer as he believes he could over come such a ordeal.(NOTE like the situation with Mr. 3 and the candle wax cake Zoro was content with cutting his own legs off and continuing his fight.) Thus the demon may ask for one of his limbs he may say that his hands are off limits but other then that the demon could take what ever limb hie choose if it would not kill Zoro. The demon choice his eye as it something valuable to a swordsmen. Now all this may sound absurd but listen me out first but if was only cut then he could open that eye just like Fujitora and on Zoro’s first encounter with Sandai Kitetsu he mentioned an aura that the blade had and once he masters CoA with that blade he can even infuse that Aura with CoA thus showing that blades abides by his will now.

I honestly believe that this is what has happened to Zoro, as physically Zoro is a extremely talented individual amazing strength, a great healing factor and the ability to withstand ungodly amounts strains put on his body . LIKE HE CANT CUT A BLOODY MOUNTAIN WITH SHEAR STRENGTH ALONE. And mentally he has shown great deal of improvements as well.

What do you guys think?

*Theory by TickTocxk

Sanji and Horus have a lot of similarities if you guys did not know, this is why I think Oda could have taken inspiration from Horus to make Sanji.
Some of you guys might ask who is Horus ? Well he was a deity from ancient Egyptian mythology, and he was an offspring of one as well. Which was Ra, the sun God.

Horus was also one of Egypt’s Pharaoh’s, he was believed to have a human form for when he became a Pharaoh and an original form, for when he was not human.

Now on to the similarities with Sanji, first of all Sanji’s eyebrows are really similar to the eye of Horus.

As you guys can see Sanji’s eyebrow is similar to the curl at the bottom of the eye of Horus.

Also Horus was known to be the sky God, in Ancient Egyptian times. This is because he was known to be a falcon in his non human form. Just like Horus Sanji is able to fly, also sometimes when Horus flew in the air people said that he represented the sun. This is just like Sanji when he uses Diable Jambe, he does not represent the sun but he burns like it lol.

This leads to my next point it is said that Horus’ left eye represented the moon and his right eye represented the sun. And whenever he flew in the air he would represent either one, so could this be why Sanji only shows one eye ? What if showing both eyes disrupts his body’s normal balance in some supernatural way ? Maybe he doesn’t even have both eyes open at the same time.

This is why Sanji probably is the observation haki specialist in the strawhat crew, before I thought that it should be Zoro, but if Sanji is the “Horus” of One Piece then this is correct. Why I’m saying this is because the eye of Horus is the mostly used as the symbol for the all seeing eye in our world if you guys did not know. Yes the same eye used by the “illuminati”, the eye in the pyramid !

Notice how Sanji’s eye seems to be inside of a triangle as well like the pyramid, because of how his hair is shaped.

Horus was also known to represent protection and this could be Sanji because if he can see everything he can protect everything. Even if he is not strong enough he can still warn people ahead of time.

Horus was also Royalty as some of you guys could already tell and some people have theorized that Sanji is a descendant of Royal blood, which I believe. Just like Horus.

Could Sanji be the descendant of a Sun God like Horus, and could this explain why he is able to summon flames out of no where with out a devil fruit ?

Lastly, could this become true, Horus had a rival named Set which killed one of Horus’ parent’s. He ended up becoming Horus’ life long rival. He was also able to gouge out one of Horus’ eyes and that eye was the one that represented the moon thus making Set the ruler of the night and Horus the ruler of the day. Set always won during the night and Horus during the day, ever since he lost his eye.

Could Sanji end up having a rival like Set in the future, or does he already have one ? Will Sanji lose an eye ?

*Theory by SpeedEyes

Lot’s of people have dismissed Smoker’s Moku Moku no Mi as a very weak logia. I understand where you’re coming from, and the argument does make sense. Afterall, the high surface area of the Smoke he creates makes it easy to harm him and he lacks destructive power beyond what he can do with his own body and Jitte. But, the untapped potential of the fruit, possibly it’s awakening is startling. Truly frightening.

As we know, smoke is a biproduct of many chemical reactions. There are two types of chemical reactions: Endothermic and Exothermic. Most smoke is made from Endothermic reactions, in which heat is absorbed by chemicals, making the temperature of the smoke quite cold. This is what Smoker’s abilities are: his smoke is cold. And therefore lacks destructive power and ferocity, however, he will soon be able to use Exothermic Smoke, either as an awakening or a simple power up.

Why is Exothermic smoke a powerup? Glad you asked. This smoke has a very high temperature. Smoke we see from fires: Exothermic (up to 2000 decrees c approx). Smoke we see from eruptions: Exothermic (up to 8000 degrees c approx). Smoke from lightning strikes: Exothermic (up to 16000 degrees c approx). Smoke given off by stars and solar m*fokin flares: Exothermic (unlimited temperature but usually around 32000 degrees c). As you can see, that’s pretty hot! Exothermic chemical reactions release heat, making the products hot. So Smoker in theory could create smoke hotter than anything Sakazuki or Enel are capable of creating.

That’s right: Smoke > Magma and lightning

Other features of Exothermic smoke products: This includes being toxic and having a choking effect, Smoker could use this to hinder opponents. This has been foreshadowed through Smoker’s experiences with Caesar’s toxic smoke, he may copy techniques as such, which does make sense. The smoke can also cause damage to soft body tissues like eyes or skin. On top of that, when ignited, some smokes can explode. If Smoker were to light a cigar then bam:

So please, don’t write Smoker off just yet. The guy’s a future monster.

*Theory by L o g i a