The NFL model of franchised businesses with no promotion or relegation is what drives this proposal. Whether the fans of the rest of the football world stand for such a closed shop is the crux of the matter. There is a lot of powerful influences at work, sponsors, TV companies and the various leagues will all want their say. The match-going fans are becoming less and less of an voice as the armchair viewers outnumber them thousands to one, , match day revenue is dwarfed by TV deals for the prem, but not everywhere , Spain being the biggest exception. What makes the future so uncertain is the Eufa/Fifa situation, both are in limbo, though they are doing their best to carry on as if the blip has been dealt with and it is business as usual.
If franchises are introduced, it would be closely followed by the rags moving to their preferred home,London, with arranged fixtures in Singapore, NY Thailand etc.
Sadly, for most of us there are dark forces at work that threaten to change football as we know it for the worse.