I think it's Inoki and DiBiase so far. Stan Hansen, who should be in the HOF along with his old partner Bruiser Brody, will be inducting Inoki.
The Horsemen are a good call, but yeah, with Naitch in TNA I doubt it. Arn, Tully and Windham are definite hall of famers, though.
Savage would be that much needed headliner. They finally did the DVD, but whether they ever actually have Savage at a WWE event again is another question.
Simmons and the Road Warriors are good calls. Maybe JBL? I could see the Freebirds finally going in, although they may wait until next year with Wrestlemania in Atlanta.
They originally named Stu Hart, but Vince took that away as part of the new Bret/Mr. McMahon storyline.