If they are smart they will try to argue that maximum player salaries are the issue and not the salary cap. The players are already getting paid less than what some ownership groups would be willing to pay them, why wouldn't they take a marginally smaller amount to win championships, gain endorsements etc...
I think it would be an interesting argument. Obviously the salary cap is off the table, but max player salaries haven't really worked out the way they were supposed to from the average NBA player/role player perspective.
It was supposed to mean more money for the non-superstars, but now the superstars are taking bigger paycuts which drags the whole system down possibly further than it would in a salary cap environment without max player contracts.