
Well that's what we have now, an expanded vfl rebranded as a national one. No need to rejig, the league just added franchises from WA, QLD and SA, and a relocated South Melbourne.Because it would itherwise mean staying in a secondary league rather than being in the big league. And after decades of being top dogs in what was the big league (VFL), they wouldn't take the risk of no longer being in it, which is obviously what the national comp would become. Furthermore by not jumping they would have opened the door for another VFL club to usurp them.
Believe me, if a national comp was created as it should have been at it was clear there would be, say, five licences for Vic clubs the established clubs would have been crawling over each other to be one of the five
No need to trip over themselves to claim a spot, those clubs are the league now, with added clubs from other states.
The established clubs were never not going to be part of it, coz HQ knew that's where the public interest was / is = $