After reading the chapter, I have a feeling that at the very end, it was not Orochi who's infront of Oden.
It's the user of Mr.2 powers
Reason simply is him stating:
"It's true, this guy is a lunatic"
So, it feels like Orochi beforehand warned them about Oden, and this person is confirming how reckless and how Oden doesn't give too shits about anyone. Not even Kaido.
So, I have a feeling that next chapter, Oden will take this person out despite being a trap, but it will be revealed that it was not Orochi. That's how the user of Mr. 2 powers will be transferred to Bon chan.