People forget Scabbards and Yamato, them going to meet momo = meeting her, she still has yet to face her father, someone healed them back to face Kaido.
Those two are wildcards, I see two scenarios with that:
Luffy/Zoro vs Kaido, Kid/Killer/Law vs BM, then Yamato/Scabbards join them.
Or Yamato/Scabbards vs Kaido, Novas defeat BM, then fight Kaido again.