You really have to pick and choose who feuds with Punk, because as previously stated by the people above me, he is unstoppable on the mic. I really wouldn't want Brock to get embarrassed by all of Punk's facts that he probably has ready.
Orton, on the other hand would be fair mic-wise, but Orton sucks... soooo, no. Brock needs to feud with Triple H and start an anti-establishment angle to capitalize on his demands from Johnny Ace. His ego needs to rise through the roof, he needs to destroy Big Show and Sheamus, THEN... when it seems like nothing can stop him... Cena returns Thuganomics style and effs sh*t up.