Thematically it should be Zoro. Kaido has already killed off the "Samurai" with cutting off Orochi's head and declaring that this Country is his and afterward he claimed that there are no more Samurai.
- Zoro is related to Wano and from Wano even if hes born elsewhere. Him coming back to Wano and giving them back Shisui is a hint itself that he is going to do something big.
- Zoro promised Luffy that he will round up all the "Samurai" for him. But luffy did it himself. To me this speaks "later later his Ryuma relation will do something" and now after some Wano citizen's have started to notice Zoro. The only way is for Zoro is to Show something to Wano.
- If luffy rounded up the Samurai. What should Zoro do? the answer is "Restore the Samurai" how ? by doing something big.
In the end who should defeat Kaido. My answer is :
"Man i feel it coming ... Gomu Gomu no Bazooka"
![Josad :josad: :josad:](https://worstgen.alwaysdata.net/images/smilies/symbols/klpW1Gq.png)