As I’ve said before, Smoothie will have a grandiose struggle with a sliding shoji this time:
A door like this figures to be too tough for Smoothie to be able to focus on anyone else.
On a serious note, Smoothie should have nothing to do with whatever Oda has Zoro’s sights on, which is one of the Calamities / Samurais on Orochi’s side. I also doubt Oda would have an extended Zoro fight with a character Oda couldn’t even find the time to utilize back in WCI.