I'd safely say he's gonna be in the Hall of Fame.I know anyone can really get in these days but due to his accomplishments and being the attraction of "the world's largest athlete " i'd say he's 100% will be in it.Unless he goes to TNA or leaves WWE on bad terms ,which I doubt he will.
Once again, the WWE HOF means nothing. There are no credentials.
With that in mind, if the WWE HOF is going on 100 years from now, EVERY wrestler on the current roster will be in the WWE HOF. That is, as long as they don't do something to piss Vince or family off like punch them in the face or something like that.