1. John Cena
Were it not for a cryptic tweet posted by John Cena this week, he probably wouldn't be on this list - let alone at number one. In fact, if any other superstar - one without Cena's spooky healing powers - had announced their apparent intention to return ahead of time, it wouldn't be taken quite as seriously. But John Cena isn't a normal man, as proven by his shock appearance at the 2008 Royal Rumble. Sure, he may be almost a decade older now, but he has unrivalled determination. I'm not suggesting for a second that Cena comes back to wrestle at Fastlane, but he could make some sort of appearance (whether live or via video message) to announce his intention to possibly compete at WrestleMania. It's a long shot, but it's hard to shake the feeling that when Cena makes a statement like the one below, he sure as hell means it... https://twitter.com/JohnCena/status/699194494768586752