It is most certainly about time!
Hope it's not too late. If the practice has stopped the case might be moot, other than recovery of firearms and/or monetary damages for those who had their lawfully owned firearms confiscated. But even to do that much, the court will have to recognize that the action was unlawful. They don't have to say it was unlawful under the second amendment. They could rule it an unlawful taking under the fourth and fifth amendment without addressing the second amendment.
It would be very interesting to see the filing by the individuals, the NRA and the SOF. Even though it probably lessons the chances of initial success at getting an injunction, I hope they are arguing only on second amendment grounds. A nice clean case, involving non criminals. If bad cases make bad law, good cases can make good law.