Zoro will get insane feats vs. Kaido and BM especially Kaido and that'll be it.
remember I was one of the people who was staunchly saying Zoro is going to fight Kaido before he fights king even before the stuff about going to the roof happened. So in my mind, way before all of this, it was clear Zoro was going to end up fighting Kaido before King. In fact I didn’t even think Killer or Law would be involved so I thought it was gonna be Three vs two yonko. And still I believed Zoro will walk out of that fight with enough power to beat King.
But you are saying that something has changed that and I don’t see it. What do you actually think is going to stop Zoro from having a detour to fight king somewhere? Is Zoro just going to get knocked out? Is he actually going to be part of the actual last attack that finishes a yonko? What will happen?