1. Kurt Angle
To be quite honest, if anyone on this list is chosen ahead of Kurt Angle, I'll be bitterly disappointed (excluding Shawn Michaels). Despite accumulating his fair share of injuries over the past few years, he remains an excellent in-ring worker, one more than capable of helping Undertaker to a great match. He's also one of the greatest all-rounders in WWE history, in terms of excelling both in the ring and on the microphone. Whether asked to play a comedic goofball, ultra-intense athlete, or ruthless bone-snapping heel, he has been able to do so with equal aplomb over the years. Add to this the fact that nobody was quite sure if we'd ever seen Kurt in WWE again, and the idea of a return becomes an incredibly exciting one. Fans would be genuinely torn between who they'd want to win, leading to one of those special 'Rock vs. Austin' type atmospheres.