Would rather see Punk go face. He sucks at being a face--unless they make him an anti hero style. I can see Punk as a Steve Austin type face. I didnt like what they did with him the last time out. He needs to keep a little edge.
Personally I don't want to see it happen at all. Love the idea of pairing Punk and Lesnar--under Heyman's tutilage. Could be a really strong alliance.