Here's my thing with Cena, i said it before and i'll say it again. I know he pulls in a lot of Merchandise for the WWE that i can understand but:
It's turning into another Bret Hart senario. When and if he decides to turn heel or whenever creative decides i should say its not going to come to anyones surprise because everyone is already waiting for it so when it does happen it's not going to have that wow factor (storage wars lol) and will wear out rather quickly i think.
His character should have turned heel at the height of his popularity, maybe, but it should have happen the moment people started to grow stale of his character, i really believe this.
I am not in no way shape or form the least excited at this point if he does turn heel because its long overdue.