I don't think some people understand how important it is for Zoro to get a role going into the end of Wano. You don't even have to believe in ZKK or think about it at all.
It would be straight up terrible for us to leave Wano and only find out about Zoro's lineage, black blades, etc. as an afterthought.
Not only is Zoro 99% confirmed to be from Wano, but we've gotten countless scenes of Orochi & Kaido mocking the samurai and calling them weaklings.
There will be literally NO arcs in the future where Zoro will nearly as important as he should be in Wano. This is Oda's time to prove why Zoro is a necessary crewmember.