This is so momentously disappointing… You have no idea
So Kaido came to wano to fuck everyone’s life up specifically so that he can confirm who the messiah is and thats it… Thats the whole beginning and end of his character?
like At this point I’d prefer Kaido want to join the Grand fleet… Like him just knowing who the messiah is too weak a motivation… What does he do with the information of knowing who the messiah is?
I can see why you'd be disappointed but that's all there is to Kaido's character. Kaido wanted to change the world for better or worse. He learned of JoyBoy's legend and didn't buy it completely—He still wanted to be the person who brings the change and probably didn't want to wait for the pirate Jesus that may or may not appear. In his mind, if there is such a thing as JoyBoy, it'd be the person who overtakes him in the race to change the world, and Luffy proved to him that he is that person.
Kaido basically lost his purpose in life, which could result in him leaving Wano alone. It is unfortunate but he is just another one of those typical villains who ended up doing the very thing they wanted to change, in the first place.
All of this is assuming Oda doesn't want to kill Kaido. Honestly, ZKK would be a more fitting end for Kaido than this^^^.