My legal take on this is Sony has no legal standing to sue DVDRanger .
Sony's legal standing would be to sue Verance for Cinavia not providing the undecrytable protection it claimed .
Verance might have legal standing to sue DVDRanger . At this point it would have to be a copyright infringement for using the name "Cinavia" if it is trademarked or copyrighted. I haven't verified it either way.
Other than that Verance would need to prove that DVDRanger had reverse engineered Cinavia & used some of Verance copyrighted programing.
I don't see how that would be possible for Verance to do since the DVDranger
never released the Cinavia decrypting part of their software.
I might be incorrect but to me a judge would require a demonstration from Verance that DVDRanger software removed Cinavia protection . Before issuing an injunction.