I don't see this as the apocalyptic event (assuming the plaintiffs win) that is being alleged. I see two outcomes:
1. The key here is the unauthorized use of the likeness. That's easily remedied by amending the grant-in-aid contract (which, after all, it is) to include a specific provision that in accepting the aid the student-athlete forfeits any right of remuneration from any entity to whom the NCAA or the institution contracts their images. Will that lead some student-athletes to forego a grant-in-aid? Highly unlikely. But if there are any, it'll be damn few. The vast majority (and I'd peg that at, conservatively, 99%) will sign anyway.
2. That a percentage of profits (note the word profits) will be placed in some kind of escrow account - or even better, some kind of fund for medical care or post-eligibility academic support. Again, this would be accomplished by amending the wording of the grant-in-aid contract.
Could the current plaintiffs get a windfall here? Possibly - I don't know if signing a letter-of-intent or related document at this point in time is a waiver of any kind of right. I suspect not, or this case would have ended by summary judgment. So, yes, the plaintiffs may get some money out of this - but I don't see it benefiting, say, next year's signing class or classes thereafter.