Who knows, hasn’t happened in Australia for two teams in the same state. They will still have half the players they like, half their colours and name. 11 home games a year too. They will probably be a powerhouse to begin too which will help retain fans.Fans won't follow a merged team, you'll lose more than you'll gain.
Again, for such a thing to happen, the merging clubs would have to consult their members and their members will refuse, even if they did then it'd have to go to a vote from all clubs, only a majority would get up.
Given that ALL clubs receive funds from the product they provide, it's highly unlikely a vote would get up.
It would be easy for the AFL to do it, just give a long lead time and warning that the two bottom teams on set criteria will be merged in 5-10 years. Tie funding to it, teams have no choice or be cut off.
Do it once for Tassie or another team to balance. If might create another big 5 team eg. 2 minow teams us now one that now have 40k at home games against interstate teams & can fill the MCG vs a big 4 team.