Are USC and UCLA going to form their own separate league? Because last I heard, they were part of the NCAA and required to abide by the rules that were agreed to by all the member institutions. I have a very hard time believing that college presidents (which make up the governing body of the NCAA) are going to suddenly allow athletes to get paid. I think the NCAA is on record as saying that if USC/UCLA do that, they will be barred from playing in NCAA sanctioned events.
It's the neighboring teams located in Oregon and Washington who draw nearly all of their talent from CA who will be hurt by this the most. Their pipeline suddenly went dry, so look for state legislators and governors from those states to follow suit, along with Nevada and possibly Arizona. What that starts to look like is many teams in the PAC 12 will have players getting paid, but very likely their conference champ won't be playing in any NCAA post-season games. And life goes on.
Let those that want to go pro or be part of a startup minor league or G league go on their own volition. If you come to college and expect more than what is originally signed for then you should be cut from your scholarship, there are plenty of kids that would love to have a full ride to college. I was one of them. The universities need to start cutting these kids that are looking to enforce policy off of a brand they have contributed nothing to and that has been around for 100+ years. This is socialism meets sports