I doubt that Oda will not show us at least how Kaido reacts after Luffy's attacks.
If Law and Zoro head down , and then BM get her bangs again and heads down as well looking for red beans , then it would mean that Oda wants Luffy to fight Kaido alone while the others , Kid , Killer , Law and Zoro and even some in the castle should take of BM together.