The markier fans of wrestling are so very fickle, it's pretty funny. If Cena turned heel it would probably take two weeks before they'd all turned on him and declared him the "worst person in the would indefinitely" despite his seven years of being the good guy.
Were you not around for this?
I mean, Vince has the tools to recreate this exact moment. Yet every day he waits to pull the trigger the more the general audience turns on Cena and the effect will be diminished.