Of course it's ending, my dude. . .
1- Marco's "purpose" was to serve as back up for the alliance (he healed a lot of people, helped to stop a bit the Oni Virus, stopped Queen and King and fought them for a while. . . and more will come when Kaido gets defeated. Remember, he said it's not his business to fight Kaido, but he will for sure give important info about the outside world, reactions and maybe Roger stuff.
2- Zuneesha's purpose seems to be to stop the entire WG fleet but until Momochad do not put his balls over the table, it's not gonna happen. Zuneesha needs to be commanded.
3- We have only 1 CP0 guy standing at Onigashima, and he's after Nico Robin. . . so I would expect to get sucessfully and kidnap her. CP0 has lost a lot here, so they will win this time and this will let to a WG confrontation, maybe allying with the RA and save Sabo too.
I wouldn't expect that ships will make it to Wano, this is not gonna happen but the CP0 guy will escape with Nico Robin on these ships when Onigashima landed.
4- Big Mom pirates. . . they will know somehow that Big Mom losts, will have some reactions and maybe they will decide if they go after an inconscious Big Mom, or they return to WCI (possible new plot here if the cover stories tell us something, you know). They will also make a new boss/captain: Perospero, Smoothie, Katakuri, Streussen. . .
5- At this point, I can only see two ways for Kaido to show it:
- Kaido tries to counter Luffy's mega punch with something, during this proccess, Kaido starts to remember about his past just because he is tired and he plays all he got now so he was never in that situation. Probably enters this awakening mode to try to boost him and deflect Luffy's attack. He loses, of course.
- Same as above but Kaido does not awakening, not even named it. He tries to counter Luffy's attack while we see the flashback until he gets tired and loses.
6- Orochi. . . if he does not die by fire or killed by Denjiro or someone else, he will get arrested and punished by Momonosuke as the new Shogun of Wano. No more deaths but he will have to walk a redemption path to redeem himself. Maybe he will tell us how the old lady and the old dude find him (the granny said even she was a Kurozumi. . . so this deserves an explaination. A Kurozumi outside Wano. . . working as a broker for someone who could be, Kaido? Shiki? The World Government? The latest is less likely but hey).
7- Explained in 5-, it could be eve a short flashback, no more than 5-8 chapters I think, but don't know.
8- They do not need to know much, they were suffering during the entire year, but this festival keeps them like "here we are safe for a day, we are on heaven, nothing happens". Of course, Momonosuke and the Red Scabbards will have some speech about Orochi and Kaido being taken out and they will start to cry of joy and so. They will acknowledge Momonosuke as the new Shogun, with his new "appearence" who pressumibly will looks like Oden, at least a bit.
9- Zoro only have pending this "Grim Reaper" mystery, who at this point it's due to Mink drug or if not, something related to warriors at the verge of death (related to a future plot tied to a PU, maybe at Elbaph).
NOTE: If we get a flashback during Kaido and Luffy clash (1047-1048), it means that Kaido officially lost, even if we get a long/short flashback. He automatically lost too.
