Zoro will be out for a bit since he has reached his limits, Luffy will soon get his 1 vs 1 versus Kaido where he will finally put him down. Luffy will be extremely tired too.
Then Kaido will go in his dragon form and fly, under the eyes of the Flower Capital.
In the chapter with Zoro's name, this will happen.
Zoro will intercept him and kill him with Hiryu Kaen (which is foreshadowed to hit Kaido since it missed him once), the same way Ryuma slayed that dragon and, similarly as well, under the eyes of the citiziens of Wano.
I am sure this is the way Oda has set things up.