4) Ric Flair
Why not? Naitch has recently been released from TNA, so WWE could snatch him up, and bring him back. It's hard to see them allowing him to wrestle, especially after the unprecedented retirement ceremony that was put on for him a few years back. The crowd would love it, and the man certainly has some credentials What about an Evolution Reunion? No? Well I'm sure WWE's writers could come up with something for this legend. As Deion Sanders would say 'PAY THE MAN'
Chances of Appearance: 50% (Who knows, the fresh TNA stink on his clothes might not sit well with Vince)