This won't happen for the simple reason that Luffy is the main character and hence he will defeat kaido. Zoro will get amazing moments throughout wano, but Oda will never make zoro steal Luffy's thunder. To the dismay of zoro fans, it is undeniable that Luffy is a far more important character and that Oda favors Luffy far more than he does zoro.
If you don't think that Luffy will defeat Kaido then you haven't been reading the past 980 chapters of one piece. If Kaido is to be killed, it will be after Luffy has defeated him. In that someone will come up to an already injured and defeated kaido, and end his life.
now kaido is a villain and all, but I doubt Oda would ever have Zoro end the life of a person who has already been defeated. Killing a defenseless person who has already been defeated is an immoral act and hence the only person who I think will kill Kaido will be blackbeard.
while there are some foreshadowings that suggest that Kaido will fight a dragon in wano, all of those could point to Zoro beating King, who is a user of a model of the dragon dragon fruit, or zoro simply fighting and possibly injuring kaido.
There is nothing that suggests that Zoro would actually defeat kaido, who is the main antagonist of a major arc.