If Zoro kills Kaido, you have to were the Dancing Oden Gif Avi until you convince
@TheAncientCenturion to change your name to "Monster Zoro's Idol Harem".
If Zoro never kills Kaido (this is resolved by Kaido's death, or Kaido surviving Wano Act 4/5, because there's no reason Zoro should kill Kaido after that), you can make my AVI whatever you want (within rules) over a year, with a change occurring every week.
I wanted Kaido to live, but... he won't last beyond Act 4. Kaido wanted Luffy to become Joy Boy, take over Wano, take Pluton, and go for the One Piece. Kaido WANTED war, and will be pissed Luffy took the peaceful path as Joy Boy.
I was on the fence about it before, but I'll go in on ZKK. I don't trust Oda to get the in between bits right, but he's never failed me on the big moments.
(I'll be honest: I think Wano and Egghead are great arcs, and we just got greedy. They have problems, but we wouldn't have this much passion for them if they were actually mid).
Every element of Zoro's plotline tells me he should decapitate Kaido, so, fuck it, I'm going all in.