From the list Hogan leaked last year I would think Million Dollar Man could go in with Flair, you have to look at this realisticly. They have to be on some form of terms with WWE and not have any negative impact in the news so none of the controversial figures will go in. I could also see them putting P.S. Hayes in since he is back in the audiences mind due to the WCCW documentary, his work with MVP and the things he does on WWE 24/7. They could do Bulldog to get his son over by inducting him as a fresh start after his suspension.
Owen would be great but I still don't think his wife is on terms with WWE, and of course Macho would be really something but Vince holds a grudge and doesn't want to do business with him.