EXCEPT the timing is interesting. And he could claim the collusion stems from the president, who has basically told owners fire these guys if they take a knee. And way back in March when FA started, Trump made some comments and specifically name CK to owners, something to the effect of "Nobody should hire this guy."
So there is possibly a claim that the collusion isn't necessarily amongst the 32 owners together as a plan not to sign him with some secret meetings and conversations but, rather, collusion because of the president of the United States.
Entirely possible and a hell of a lot easier to prove than a secret pact between 31 men and a board of directors of one team.