I think the problem is that the McGann film actually featured Sylvester McCoy as the Doctor as well, thus establishing it in the canon. It would take a lot of balls to say, 'Well, let's just pretend it never hapened - Sylvester, old boy, would you mind coming in and dying for us again some time?' This seperates it from the Peter Cushing films (generally accepted as either non-canon, or as being another actor playing the Hartnell Doctor), in that there's nothing in them which establishes a certain continuity.

jonthecelt