Vince has shown in the past that he wil put aside personal grudges for the good of his product. He definately put aside grudges with JJ Dilion not only to get him to particiapte in the Horsemen DVD Retrospective to appear on the RAW tribute to Flair after WM 24.
He has certainly put aside grudges and hard feelings to work with Bischoff, Hogan, Nash, and Hart through the years. If there is money to be made Vince will cave.
That said, Im not sure why such vitrol exists between them. Ole has had a reputation for rubbing people the wrong way, even close associates like Arn & Flair and Dusty Rhodes supposedly. Heck if Dusty & Vince could make peace and Bischoff & Hogan could make peace with Vince I cant possibly see why he and Ole cant unless Ole just finds it completely unneccessary. Its actually a slap in the face to induct the group without Ole. Of course, the HOF should have Randy Savage & Bruno Sammartino in it as well, although in the past what kept them out was their unwillingness to participate.
All that said, realistically about 7 names should go into the HOF as part of The Horsemen Induction: The original unit (Flair, Arn, Ole, Blanchard), Lex Luger (the group had great success with Luger as a member, this may have been the height of the popularity of The Horsemen vs Dusty Rhodes fued), Barry Whyndam and manager JJ Dillion.
The various incarnations post 1990 that involved Sting, Sid Viscious/Justice, Paul Roma (man that was bad), Benoit, Malenko, McMichaels, etc all had varying levels of success but not at the height of the Group's 1985-88 run. Kind of like the NWO was never the same in any incanation after eary 1999, too many changes and re vamps, it never clicked on the same level. The constants were always Flair & Arn, but the group as a whole became a force when Ole was involved and grew to greater heights with Luger and then Whyndam. Nothing that the other names added ever compared.