10. Daniel Bryan
If Daniel Bryan can get fit in time for WrestleMania, he'd make an excellent substitute for John Cena against The Undertaker. It would be a certifiable match of the night, no doubt about that. And if Bryan does get fit, there's a very good chance that this match could happen. That's because The Undertaker did in fact request to work with Bryan at Mania a few years ago. WWE of course went in a different direction, but maybe in 2016, with Bryan's increased profile, it could happen. It is the kind of match which is guaranteed to make Taker look good, hence why he wants it. He genuinely respects Bryan as an in-ring worker. However, there's no way Taker retires on this match. He'd win and then wait it out for John Cena at WrestleMania 33. As for Bryan, there's just as much chance that Mania 32 could be his own retirement match.