Plans at the moment is for Cena and Punk to form a heel faction, consisting of John Cena returning to his Rapper Gimmick, and for CM Punk to become 'MC' Punk.
they'd actually make a good heel stable with another one or two guys. punks a really good heel and I actually liked Cena when he was the rapper heel on smackdown. MC Punk is stupid though lol. Who knows it might work. Stranger things have happened.