The more I think how oda can show Kaido defeat the more I come to the conclusion that he will use a combo between Lufly&Zoro thta didnt happen yet.
Oda doesnt want that Kaido will fall only by using punches, and so far the 2 most effective where Luffy&Zoro but they never tried to work together in a combo attack.
The same happen between Kid&law they never tried a combo attack at the same time vs Big Mom.
They key to defeat the Yonko is not 1 but 2 or more at the same time.
So I dont know how the plot will progress and make Luffy&Zoro meet again but that duble combo between Luffy&Zoro could be the key to take 100% sure down Kaido.
Let see, I feel like Luffy will take a break so is Zoro, good, actually to let them figurate out new thing for the final encounter.
I hope Oda will shift to the rest fight and close it 1 after the other.