Concerns regarding Underverse & the questline

[Sasuke Uchiha]

The way I always saw things is that the quest is the officially documented way out of the Omniverse, but that any sufficiently compelling story would also work. For example, if I get Banished, I already have a story line in mind for my escape, and it has nothing to do with fighting in a coliseum, or being someone's lackey.

I had the same impression as you, however, I found that we were both wrong. (Overruled by an admin) The only way out is to pal around with Diablo as it says in the quest.