We discover that Yamato is a woman..
Simultaneously Perospero is the only Bm pirate currently approaching Onigashima on his Candy monster,coincidence? Definitely not
We also know that Kaido wants to make an announcement later In the banquet that may create confusion amongst his goons who are seemingly not aware of Yamato's gender calling him "young master".
So is it possible Kaido intended to seal his alliance with Linlin by revealing Yamato's gender to everybody and having her marry a son of Bm ie Perospero?