Admittedly, John Cena is pretty much already balancing this role with his in-ring career. The man makes more 'Make A Wish' appearances than any other celebrity, all the while maintaining a hectic WWE schedule that sees him wrestle up to 4 matches per week. John Cena doesn't take a lot of time off, and is utterly dedicated to the WWE brand. That's something Vince McMahon really likes about him. Upon retiring as a full-time worker, it's likely that Cena will transition into another role behind the scenes. Love him or loathe him, he does work extremely hard, and that's important to the WWE machine. As an ambassador of sorts, the guy could continue representing the promotion with aplomb, shining a positive light on all things World Wrestling Entertainment. Of course, it's likely that he'd occasionally come out of retirement to wrestle or appear on television. That wouldn't have an impact on this job, at least not a negative one. John Cena is Vince McMahon's perfect WWE employee, because he is unwavering in his appreciation and adoration of the system. It's impossible to see that changing.