Crazy Scenario
Zoro defeats a flying six-member while protecting a strange person who was on the outskirts of Onigashima or he defeats this strange person. (This person turns out to be Yamato). But he doesn't tell Zoro that he's the son of Kaidou. Yamato finds out from him that they plan on defeating Kaidou and Orochi. Yamato hates his father so he joins Zoro and guides him to the banquet(Zoro can't get there on his own lol). Yamato has taken a liking to Zoro and his strange swordsmanship.
Later on, Zoro and Yamato are caught by Kaidou and His Alliance at the banquet. Yamato reveals his identity to the drunken Kaidou and tells him to spare Zoro's life. Of course, Kaidou would say no. Orochi recalls that Zoro even tried to kill him. But Yamato also overheard that the person who found him would have the chance to take on one of the Allstars. After a bit of grilling by Yamato, Kaidou agrees that a promise is a promise. Not to mention, he recognizes the sword of Oden that Zoro has with him which has piqued his interest.
Kaidou asks Zoro which all-star he will take on. Zoro sees King's sword and smiles, "Him".
The crowd begins to laugh. Zoro's bounty is brought up, "320 Million Berries" and King's Bounty is finally revealed to be "1.65 Billion Berries." King is said to be Kaidou's strongest subordinate along with a list of other feats that overshadows Zoro by miles. Orochi says, "An execution to commence the celebration! Fufufufufu!" The crowd erupts into even more laughter as Zoro places a sword in his mouth. "Three Sword Style!? AHAHAHAHAHA. Is this a circus act?"
Luffy is in the crowd amongst the beast pirates looking on with a serious expression. Ussop asks Luffy if they should help Zoro but Luffy only smiles and says, "He promised he'd never lose to a swordsman until he defeated that guy".
Kaidou and his forces, Big Mom, her commanders, and Orochi's forces look on as King and Zoro take the center stage. The samurai duel will commence soon!