Zoro has taken a lot of damage this arc. He was nail, scythe in the shoulder, Hakai. Injured Zoro is my favorite. While I want him to fight, I also want him to stay injured.
I have been rereading Wano and this is the first time that Oda really established Zoro's connections to other characters. I think a still injured Zoro will reunite with Hyori and Momo (maybe?) They will confront Orochi. I want that to be more of a character development moment because injured Zoro could easily kill Orochi. On top of that, I want to know more about the Shimotasuki village connection. If Oda can connect Kuina to the Shimotasuki clan, then I think he could give Zoro more of a backstory.
I still believe in ZKK. I don't know how long it will take for Zoro to heal in order to confront Kaido again. I liked what he did on the roof but it seems like he was supposed to do more. He uses Asura after 500 chapters and it doesn't cause Kaido to fall to his knees. Then we have Oda saying that he is a CoC user. I believe that needs to be brought up again. Finally he has parallels to Ryuma and the possibility of turning a sword black.