The amount of money it would garner in rights packages would be wild. Every regular league in Europe would be devalued, meaning the billion or so going in TV rights annually to each of Ligue 1, LaLiga and the Bundesliga would join the large part of the Premier League rights in being redirected to the new competition.
Lot to do to get there, but it simply can't be ruled out as long as it represents a step change in revenue for all these clubs, which is why they keep hatching new dirty plots to get it going.