What if the TV Movie originally had Tom Baker?

Originally in the TV movie instead of McCoy being the starting Doctor it would have been Tom Baker. This older Tom Baker would have died and regenerated into Paul McGann's doctor. If they did this how do you think Big Finish, the New Series, and expanded media would have responded? Big Finish could only get Doctors 5-7 in the beginning so I imagine they would not consider the movie canon, or maybe an alternative timeline. Virgin's license ended when the movie came out, but the BBC did have a Past Doctor novel range in the early 2000s would those novels just ignore Davidson, C.Baker, and McCoy? Or would they backtrack and instead just ignore the TV movie? The 1996 TV Movie was fairly successful in UK and McGann was somewhat iconic as the Doctor at the time.