[pseudalopex]

The states brought suit in the court specified by federal law. They don't get to pick the judges. They're suing the FCC, not Congress.

The courts will either uphold the order or overturn it on procedural grounds. If they uphold the order, Congress doesn't have to do anything. If they overturn it, the FCC can try again, Congress can amend the procedures the FCC is required to follow, and/or Congress can enact the same rules the FCC improperly ordered.

The other part of the case is whether states can enforce their own regulations, which several have already passed. It's better for everyone to resolve that question promptly and with a single case. Declaratory judgment, where the courts resolve a dispute before it reaches a critical point, is part of the design.