It's a class action lawsuit, so no need for each plaintiff to file their own case. The filing requests the return of license fees which were wrongfully collecte

It's a class action lawsuit, so no need for each plaintiff to file their own case. The filing requests the return of license fees which were wrongfully collected due to the copyright being invalid. Presumably it will need to be shown that the invalid filing was deliberate, the issue being whether or not Warner believed they owned the rights in good faith.