Lets go with the start..
8 VFL teams (9 if you include Sydney)
2 WAFL
2 SANFL
You really think this would have gone down through fair and balanced negotiations...WA & SA conceding the VFL gets 4 times the teams? VFL agreeing to 2/3rds (3/4s) of it's teams playing this league without taking control, leaving it with a league of 3/4 teams?
In the self interested world of the early 80's yes it could have easily happened, but the way in which the VFL was set up probably saved it from itself (if you're a fan of the way it turned out which you seem to be).