Imo, I don't see BM going down before the YCs. Yes, I know the trio usually finish fights back to back, but BM is a special case and should be effectively around until the absolute end. Law and Kid, while not main characters like Zoro and Sanji, are essentially Luffy's contemporary rivals and also his greatest allies. They deserve the 2nd to last big exposition I feel like, which isn't to say Sanjis or Zoro's will be any lesser, just before this.