Cena's not the top face, like the breh below says, he's already been a heel. All guys past puberty hate him.
But I gotta disagree that the neckbeards will like him if he turns heel. They'll still hate him, I don't think cena can pull off being a good heel anymore. He won't return to the Dr of Thuganomics, he'll just put on a generic arrogant persona that won't even be hateable to adults, but def not cheerable.
But yall nikkas gotta stop with the narrative that there needs to be a "top face". There does not.
We could go back to shades of grey like in the Attitude Era. Or an ensemble of faces. There's more than one way to book a show, there's a lot of myopic nikkas here.
Cena won't turn heel not because there's "no one to replace him"

, but because Vince and him already decided years ago that he will be a face for life. Face in the eyes of Vince and children.