It seems that taking over Udon wasn't going to be as simple as Luffy thought. I have to give the warden some credit. Just when Luffy was acting all confident, the warden turned the tables on him. This shows Luffy that he can't get too careless even with fodders, especially those who don't shy away from underhanded tactics. Luckily, he got the support of Hyogoro, Raizo, Kiku, and Kawamatsu. Kid needs to be free as well. Can't have the prison uprising without him having part of the action.
With Kawamatsu finally making his full appearance, the only Scabbard left to be revealed is Denjiro. Plus, Oden and Toki also need to be fully shown and not just as silhouettes.
I agree with Chopper on one thing. Forget about Big Mom. She is Queen's problem now and hopefully, she will become Kaido's problem as well.