I don't think California is going to have to stand by itself or strongarm anyone. I think there are plenty of states/universities that will likely enact similar law.
i'm not so sure.
first, i might be wrong but i think i saw where most cal schools were against the law, or at least apprehensive about it. ncaa IS the schools, that's the only ones they represent. they wouldn't have the rules if the vast majority didn't want these rules. or even a strong minority.
second, and i am not an attorney so take this with a big block of salt, i don't think most states will need to. nothing they did in this act really changed anything. all they did is basically make a law that 'nullifies' the ncaa bylaw. ncaa has some interstate commerce and antitrust protection due to the type of entity it is, but they must be within state/federal laws. however, i don't think you can just make a law for the sole purpose of nullifying a bylaw of such entities. (everything i just said it amateur hour based on what i've read/seen/heard, and could be completely off. would love to hear some attorney thoughts on it).
also, and more importantly, most states won't need to because it will work itself out without them needing to do anything. as i said, this law doesn't make anything that was previously illegal legal, it just attacks this bylaw. whether the ncaa decides to just go along with it and adapt, fight it and win, or fight it and lose, it'll be resolved long before the other state will
need to make changes. some will anyway.