Kaido and Orochi: We have prisoners, can you let us live so we can keep them hostage?
Oden: Hmm let's make a deal. Can you keep everyone hostage for 5 years, gain more military might in the process and then quietly leave?
Kaidou and Orochi: Sure, but could you also throw in dancing around naked for 5 years as a bonus?
Oden: Done deal!
You would think this is a joke but that is essentially what just occured. Oda completely dropped the ball here, this is beyond laughable. The boiling moment this chapter by itself would have been great, iconic, but was ruined thanks to the atrocious explanation behind the deal. Never has a character deserved every bit of what came to him more than Kozuki Oden, starting all the way back from his negligence of Wano in the first place, to the single dumbest decision in the entire story when he did come back.