I still think it's a long-shot that Punk comes back tonight but here's what would sell Wrestlemania to me. He comes back and they play off the whole "walking out" angle. He goes on about how he's sick of part-timers and wants to right all that's wrong in the WWE. And he wants to give the fans what they want. So he reaches an agreement with Triple H. They wrestle at Wrestlemania. If Triple H wins he'll leave or do something demeaning. But if he wins then Daniel Bryan gets added to the main event. I'm not sure if they're buddies or anything in real life but for the sake of the angle it would work. The outcone would be Bryan wins. Setting up a CM Punk heel turn and them going at each other for the title.
But in reality if he does cone back he'll get booked in a great match against Kane.
03/07 - Video Games Live
03/20-21 - Trois-Rivière Metalfest
04/03 - Harms Way
05/09 - Faith No More
05/16 - Sons of OTIS
06/20 - Bolt Thrower