#2 John Cena returns, turns heel
It's quite clear that John Cena's full-time days as WWE's face of the company are over, as the former sixteen time World Heavyweight Champion has shifted his focus away from pro wrestling.
While Cena has always been WWE's poster-child good guy, he has mentioned in the past that he'd be open to turning heel if the right opportunity came about, and with the company's rating slipping every single week, now could be the time to bring him back, and turn him heel.
WWE deciding to turn Cena heel will work for the first few weeks, but after that, it'll be all about how it's executed. Of course, it would have the potential to be a Hulk Hogan in WCW-esque run if done correctly.
The only problem the company would have in this situation is that the fans would likely be 100-percent behind Cena as a heel, simply because the majority of the wrestling audience has been begging for it for over 10 years.