In my view, the lawsuits would be shaky.
The whole argument for paying players in the past has been that they're due a share of the revenue they help generate, which the sport has seemed to either come to agree with, or at least ultimately caved to.
So when non-revenue players start filing lawsuits, claiming they're entitled to a cut, I'd be looking at them and demanding they show how, exactly, they're generating any of this $20.5M they want a piece of.
....I just ended two consecutive paragraphs with prepositions. I can do better, but I don't feel like it, though it does make me a little sad inside.