Eeshaan

Storm I think it's probably gonna be more lore about fights in god valley, or about davy clan. And maybe he will leave it as a cliffhanger (classic oda) and cuts to current events in elbaf.

No one knows mihawk's power yet. Many people take his spar against vista to scale him, but he didn't even use a single named attack in the series entirety, atleast for now. Just like how oda kept shanks divine departure in cloak for many years. And shanks divine departure was "inspired" by rogers divine departure, and he replicated it later on, it didn't mean that shanks learnt divine departure before hitting 15.

I think that they were crewmates, but ryuma was sent 400 years ahead by toki, might be due to an essential duty assigned to ryuma by Joyboy himself. Like, for protection of wano, pluton, etc

If sanji gets conquerors haki, there is no point in it's rarity. And moreover, conquerors haki will be just a massive buff for sanji, if he gets it. Sanji with conquerors haki will be easily above zoro and will be very close to yonko level. Why? Because sanji already has a broken speed, obs haki, dura and endurance stat, and with conquerors, Sanji's AP will rise too, which puts him in admiral level at least

Elbaf will be like a training arc for the strawhats.

My theory:

Luffy vs Loki, luffy's gear 5 duration time will increase

Zoro vs sommers, zoro will be able to use ACoC for longer time and discovers about his CoC

Sanji vs Qilingam, Sanji's usage of armament haki increases, and possibly, he might reach low admiral level after Elbaf.

Usopp vs Gunko, since both of them are ranged/ projectile fighters. Usopp might get control of his observation haki, and with the giant warriors help, he might unlock armament haki as well.

Remaining straw hats might focus on defeating the "manifestations of fear", along with giant warriors.

Elbaf will be more of lore than action, revealing more backstories.

That's a good theory right there, but what I believe is, neither zoro not sanji would touch admiral level after elbaf. The only reason is, since their respective fights with all stars, zoro and sanji have been shown a uniform growth in strength. If they go admiral level suddenly after elbaf, it will create a major disturbance in one piece power system. But, at the end of elbaf, zoro and sanji will be at the top of all yc+.

Sanji with conquerors haki would be cool, but the guy doesn't need that one. If oda gives sanji conquerors, or advanced conquerors, that would be greatest powerup for him, but that doesn't happen in the near future ig. Because sanji is already great character with great speed, attack, hax, durability, that rivals zoro. But giving sanji advanced conquerors will be just an overkill for his opponents, like, who doesn't like sanji after getting conquerors? If he gets conquerors, it means he has great ambition, willpower, intelligence, character development, and many more, that would make sanji the main character or an "ideal" character. But, knowing oda, he won't create a "perfect character" until or unless he has a great importance in the final saga than the main character.

Tl,dr: Sanji has that potential to unlock conquerors like many other characters, but he hasn't showcased any moment, atleast for now, that proves that he has conquerors haki

"Gaban is a rockstar on par with roger and Rayleigh" doesn't mean that gaban is as strong as roger. It just means that he is just as infamous as roger and Rayleigh.

The translation might be wrong for the context

Now this is some serious glaze, except luffy, none of the monster trio are yonko level

Zoro on one hand, struggled to one shot lucci and sanji on the other hand didn't do anything that puts him in "yonko level" feat, either of them have backlogs, and they are yet to unlock their prime forms