I don't think Zoro will have to develop something new to beat King or Kyo he can just use his timeskip training but maybe he shows more in a later fight against Kaidou? Not quite sure tbh but IMO Zoro is for sure getting multiple fights durng this War
But thats the thing, Zoro is the only character who by design MUST create a new move to win every single big fight he ever has. Literally only two fights Zoro has had in the whole story have ended with a repeated move. That's Onigiri used on Cabaji and Axe hand Morgan in the first two arcs of the story he was in. Since then every fight Zoro has gone all out in required a new technique until the time skip when he started finishing fights with improved versions of pre time skip techniques since most of everyone he fights doesn't require him to go all out.
By design Zoro going all out means he creates a new technique to win. So the only way Zoro can go through all of Wano without creating a new move is if he doesn't go all out and that's a travesty to me because we're in the endgame now. Surely there must be someone who can push Zoro that hard. Like the video game creaters are in a drought recycling pre time skip moves for Zoro.
If wano doesn't have any contenders including King then what are we even doing now.
Anyway maybe Oda dropped this pattern of Zoro having to create new techniques to win fights and all he needs is better swords but that's a big let down IMO. Like it's obviously more interesting for Zoro to male techniques rather than go on sword scavenger hunts for power ups. Well that is unless Oda realised that Zoro's techniques had reached unexplainable levels like with Asura and decided to drop this pattern because he couldn't keep up.