Since this is only the second round against Kaido and BM, that too many actors are absent (Tama, Hiyori, Hawkins, the marines, the BMP and Kanjuro and Orochi if they are still alive) and that the final battle will happen on the mainland I do not think that the supernovas, the Straw Hats and their samurais, minks or ninjas allies will win most of their fights here.
If Sanji really does have a fight against King instead of just a short confrontation he can only lose against him, same for Zoro or Jinbei.