Going back to the possibility of a Punk/Brock match, it would be neat to see it happen at Wrestlemania instead of Extreme Rules.
Perhaps Punk and Heyman's relationship becomes strained with Punk losing the belt at the Rumble to the Rock, and then losing again the following month at Elimination Chamber as well. The Punk/Heyman duo officially dissolves the next night, with Heyman smacking Punk and telling him he should be better than the Rock but that he's dropped the ball twice now and so Punk lays him out, just as I said in my original post. But then the following week on Raw, Heyman calls Punk out to the ring because he says an apology is in order, but when Punk gets out there, he finds that Heyman expects an apology for Punk for attacking him, rather than the other way around. When Punk refuses to issue an apology to Heyman, he says he has no choice then but for Punk to pay the price, and then Brock Lesnar comes out of nowhere and attacks and destroys Punk. This sets up a feud for Wrestlemania, with Heyman's two guys competing against each other, and Brock putting over Punk.
The only problem with this is that it kinda leaves HHH and Undertaker hanging and I'm left wondering what they'd do, although I feel HHH might just sit out this year's WM anyway. Also, Punk isn't turning face anytime soon (he works better as a heel anyway, although he can still have his assholish personality even as a baby face without much change except to be feuding mainly with heels) with Del Rio and the Miz and maybe even Ziggler turning face. But this would be a great way to turn him and have him feud with Brock IF he did turn face.