in the end Zoro will also fight Kaido, but he will also fight King for sure
Zoro only have attack power, King could have hax powers, speed, flight, tricky techniques..ect
the fight will resemble Zoro vs Kaku, maybe a bit harder, and am even expecting Zoro to get the nidai before the fight( another power up)
the builder up and the hints for Zoro vs King can't be ignored, I don't think we reached the climax of the saga yet