I'm very curious about this.
There's a ton of factors that could go against him having a great match. Ring rust and his opponent being someone he has no history with and doesn't have the experience to lead the match being the main ones.
BUT, Punk's forte was always this type of setting. A big match, high stakes (for him) and being fully motivated to show people he still has it. He always stepped up and went up a level when it was a situation like this one.
Gonna be interesting seeing what they end up coming up with.