They do need us, they can't abandon the premier league yet until they have built another competition that rivals it. That would take transitional seasons when the big clubs compete in the premier league and a super league, once that's an established commercial equivalent to the premier league they will abandon the premier league and sail off over the horizon along with Barcelona, PSG , Milan and the others who have deystroyed their own leagues by being greedy.
It's better we , the PL, fight this from the off. Even the big 6 fans are against it, it's our only opportunity to fight it and letting it in through the back door , FIFA, is a mistake all of football (fans) will regret.