Punk at Wrestlemania

Scott,
This is an obvious topic, but I'm interested in you and the blog's opinion, especially after the recent direction of his character-who do you think Punk will/should face at Wrestlemania? They have hinted at a Punk/Rock match for the title, but I just don't see them letting Punk be in the main event of a show that can have Rock, Lesnar, Taker, HHH, and Cena at the top. Since they're clearly pushing him to be the top heel, do you see him facing one of those guys(and probably laying down), or do you see him dropping the title before then and facing somebody like Sheamus or Daniel Bryan to push them further up the card? I'm sure most fans would like to see him face the Rock because we'd be guaranteed a good match and probably a better story leading up to it than Punk/Jericho and Rock/Cena from last year, but the fact that they don't trust Punk to main event B shows makes that seem pretty unlikely(although still more likely than an Austin return as some have suggested). Just wondering what you think.