The olympics are coming up...
...in Brazil...

...
Good point. Then, they should go on strike rather than to court. Given that they agreed to the current pay via Union contract and play in a qualitatively different and far far easier league than the men, they don't have a good legal case. The quantity of work they do is equal, and relative to their respective tasks, they do higher quality work. But their respective tasks are non-commensurable.
In the other thread on this, I argued against those claiming the women
deserved lower pay because they weren't as skilled at soccer. That is invalid, because their jobs are to beat their assigned competition and raise revenue, not to beat teams they never play (men vs. women). Here I'm arguing that while you can't claim they
deserve less and in an ethical sense they arguably deserve more, it doesn't seem a violation of law for them to be paid less, given the different difficultly level of the job they are assigned.
However, if their claims about revenue they raise are valid, then they do have a strong economic bargaining position.
Gendered sports create a situation where people try to apply a "separate but equal" policy, but it is as bullshit there as it is in trying to apply it to education.
IF they are separate, then they will not be equal, and that is more inherently true of sporting competitions than schools. With sports, if they are not equivalent competitions, then you cannot claim that unequal compensation for winning them is a form of illegal prejudice. But if those in the easier competition wind up generating more revenue, then you can claim that they "deserve" more pay and should and could bargain for more pay.