the NFL attorneys would have a hard time explaining to a jury why a contract APPROVED by the league is suddenly NOT good a year later. I think that would be the key argument is proving something under the table was going on; and once you do that its all over for the NFL.
We'd think so, right? But the NFLPA signed away their right to sue over legal matters prior to 2011 when they inked the new CBA (which is why Doty threw the case out in the first place, and the court of appeals agree with despite overturning the case).
Furthermore, even if they still retained the right to sue, the new CBA defines "collusion" very specifically and this instance doesn't really fit the reqs from what we non-legalese people can tell-- if you want to read up on it, it's article 17 of the new CBA. I'm no lawyer so I could be wrong. But the biggest argument to made here is that no one forced the NFLPA to sign off in the cap reallocations and they actually ended up benefiting.That's not duress, it's a contractual agreement that smith made to save his own tail in his election year. At worst, it's Business acumen and a solid checkmate
What they should have done is claimed collusion right then and there when they were presented that compromise. But they didn't.
Elaborating a bit on article 17, the alleged collusion would have to be proven to have affected the PA economically. In the short term that may be easier to prove, but obviously what's good for the owners and league is ultimately good for the NFLPA as well because they are the dependents in this scenario, so how can you definitively say that a false salary cap ultimately wouldn't have been better for the players association if the nfl maintained integrity and profits continued to surge?
So even if the NFLPA can prove collusion, it may not matter because they've gone with the flow so long, signing off on potential collusion and agreeing not to sue on matters concerning years prior to 2011.
Anything short of an anti-trust lawsuit, which I don't think either party would want, doesn't seem like it's going to make much of a difference.