Coming up during one of the next Wano Intermissions: the complete eradication of the Doors of Justice and the complete annihilation or flat out mysterious vanishing of Impel Down. Chaotic times are ahead. Who's the culprit? Need I say it? Blackbeard riding the recently unearthed Pluton...and maybe also a certain flying Pirate
Weebil won't be the only suspicious "Son/Daughter of "Insert Famous Pirate Here" to randomly appear out of the woodwork. I suspect we'll be seeing quite a few more cropping up shortly, courtesy of Shiki's Strongworld-style hyper-evolution/possible cloning experiments. See all my previous ramblings about Shiki, Weebil, and the resurgent ROCKS war machine in Kano
I've mentioned that Wano as whole itself may have once been a "leftover" town itself in the past, perhaps a gestalt of various other ghettoes collected from around the world by some large oni, as per popular theory. It's purpose: to serve as a dwelling for various misfits, criminals, those who count amongst the lowest dregs of society
One name that I haven't really seen turn up in much Wano-related discussion? Hyo's apparent antagonistic rival and instigator of the Mountain God incident which led to Oden's exile to Kuri. Quite curious that said character has yet to turn up or garner further mention. That or Oda's simply biding his time to spring another surprise.
What is One Piece? Got a few different ideas, but one major theory I have right now is that it's the Story of All Things; some kinda log similar to that of Oden or even the poneglyphs. But it's not just some dry historical ledger, but perhaps an elaborately crafted tale or theatrical production that can make audiences both laugh and cry...sorta like that of Roger and Oden's adventures, ya?
Lots of Death and Hell symbolism permeating the entire Wano arc, even as it pertains to Captain Rocks. While I'm not 100% deadest on it, I'm beginning to think there's a strong chance that Blackbeard's inevitable 3rd devil fruit will be one related to death ( and NOT Cerberus ) - Hito Hito no mi model: King Enma/Yama/Shinigami, ie an actual death god or King of Hell
Assuming Wano does consists of several islands relocated by an Oars giant, it begs the question: what's keeping them afloat? Answer: below the literal skull that encompasses Onigashima is an entire skeleton...the remains of a colossal Titan that continues to stand and hold up the island of Wano to this day. This being holds up Wano same as Zunisha does Zou. Parallels.
Blackbeard may be a literal mutt whose diverse family tree includes Minks ( of the dog/wolf variety ) and possibly much more ( Tengu, Three-Eyed Tribe...). As mentioned previously, good chance of more subdued Sulong-type, lycanthropic transformation happening under a full moon.
Who is Ussop's mentor, Heracles? Shot in the dark: a descendant of a past Tontatta warrior who dressed in samurai armor crafted from a beetle's carapace, having been inspired to travel to Wano and developed an interest in botany thanks to Norland - a man who came across both the dwarves and Wano during his travels.
Orochi wormed his way into becoming Shogun by convincing people he was Sukiyaki's lovechild with a mistress or whatever. Wondered if it might be true ( unbeknownst even to him ), but that'd put his pursuit of Komurasaki in a creepy Luke-Leia-kissing kinda light. So I got to thinking, well, people've pointed out his similarity to late-life Yasu...perhaps Orochi is actually a relative of his?
By Wano’s end, might be the Moon will know the glory of Dawn as foretold by Toki in a most literal way...when both Sun and Moon appear in Wano’s sky at the same time in an atmospheric phenomenon known as a selenelion/selenehelion.
Zoro 1-ups Sanji once again ( in a dumb way ). If Pudding can be said to possess 2 different sides to her personality, Zoro's potential love interest Komurasaki ( possibly like her mother before her ) will show THREE different faces throughout the arc.
Former Rocks such as Shiki haven't simply been building up an army in the past decades. I believe the real mastermind Kaido in particular has been planting spies all over the place for quite a while...and may have even infiltrated the upper ranks of the Marines themselves. And yes, he ( or they ) may be some very high tier officials.
The rumors concerning the Mink tribe’s alleged purported hatred of humans isn’t just worthless superstition; there’s some kernel of truth to it. They owe this infamy to their more violent ancient ancestors...a number of whom may’ve actually preyed on humankind.