u/Basic_Mastodon3078

I have read up to 1057 for context about what information I have. (The end of Wano)

I think the Final Arc will be split into two parts. Kinda like Water 7 and Eneis Lobby. The first part is Laugh Tale. Here, Luffy will become King of the Pirates, find the One Piece, will finally meet up with Shanks and defeat Black Beard. Then, the second part will be the great battle against the world government. Anyway, here's my theory for how the battle will go.

Luffy, as King of the Pirates, will make a temporary alliance with a bunch of pirates, good, bad, villains (possibly the guild for instance), allies, (Definitely most of the worst generation that's still around at the very least) such as Law, Kidd and Killer, remnants of White Beard pirates, other allies like the samurai of Wano and the grand fleet and probably Shank's pirates. Alongside the revolutionary army, Luffy will lead the pirates into war against the Marines and defeat the Marines. I also think that Luffy will have to defeat Garp, or at least, there will be a confrontation between the two of them. Essentially, Luffy will bring together all the different allies he's had, command them under his own authority, and free all of the world. It's not an insane theory, but I do think it would be very climatic. It would be a treat to see all the allies Luffy's built up, follow the King of the Pirates to battle. Idk.

As for what the One Piece itself is, I think it's like a Poneglyph, but not just any Poneglyph, but the Poneglyph that ties everything together. It would tell the story of the void century, it would give us Joyboy's backstory and would make us figure out what the hell the will of D is (my theory is that they are the descendants of the heros's that fought the founders of the world government. They are essentially the mirror image of the celestial dragons or something along those lines). That's what the One Piece is too me. I specifically think it will be information also about the ancient weapons, what they do, what they mean and why they are needed.

I'm not in uncharted territory here, basically everything I've suggested I've seen in other theories, but all together I don't think so. My hottest take is probably that he becomes King of the Pirates before fighting the marines and that Luffy has to battle Shanks in some form. (Possibly not an actual fight, perhaps it's a davy jones fight. And once Shank's loses, he gives Luffy the hat permanently as the gift he receives. Kinda like how they stole Foxy's Jolly Roger)

Oh and at some point, Usopp (if he's still alive based on what I've heard about Elbath) becomes a brave warrior, Nami completes her map of the sea, Robin obviously figures out everything she wanted to know, Sanji and the others destroy the red line and he finds the all blue, I don't know what Jinbei's dream is, Zoro defeats Mihawk etc. Basically they all achieve their dreams with the exception of Brook. Let me explain brook now.

I think there will be a couple of chapters at the end of One piece that are basically an epilogue. The characters return to their hometowns (or in Sanji's case, his home... boat?), changed. On the way back, Brook will reunite with Laboon and take over Crocus's position at the lighthouse. Or something along those lines. Crocus is getting old, and Laboon will need a new caretaker. I think it's sweet.

Like I said, it's crackpot and a little all over the place, but it's what seems most likely to me at this time. Don't spoil past 1057 please.