Already gave my opinion:
https://worstgen.alwaysdata.net/for...y-will-end-up-beating-kaido-in-a-1-on-1.9863/
He has absolute no chance of outshining Luffy. Not only I believe Luffy will be the MVP, but I believe Luffy will ultimately beat Kaido in a 1 on 1
Both from logic and manga evolution, Luffy is dressed to come out of the arc comparable to Yonkos
The other SNs imo will serve to weaken Kaido, with Zoro's build-up being focused around Kaido's scar but Luffy will get most of the credit in beating Kaido
Outside of Luffy though, yes it's clear Zoro has superior build-up to the rest and thus for this reason has high chance to have better showings than any SNs not named Luffy, well as far as the Kaido fight is concerned because I believe Kid has a chance to have better portrayal if Oda aims at him being the one to finish Big Mom
Considering that it's Kid's introductional arc as well, that Oda built a rivalry between Luffy and him in Udon, with the parallel between Zoro and Kid's partner(Killer), his connections with Shanks(Luffy's idol) that should extend post-arc, plus the fact Oda himself said the moment he created Kid, he wanted him to be even more significant than Law(who had better showings in PH, Dressrosa), it could also makes sense
Basically it could be a scenario where Zoro's showings against Kaido is the second best to Luffy's, but Kid finishing Big Mom outshining that. It's debatable though because it's unclear if Big Mom would even be defeated, in which case Zoro might be the one to get better showings overall
I think he has higher chances to receive better showings than Law though
So I'd say that in terms of showings, it could be this way
Luffy > Zoro/Kid(50/50) > Law > Killer