Ok, so it looks like the deal is that the dispensary wants a final decision from the Feds, under Federal law, dismissed with prejudice or something to the effect to where the issues can't be raised and re-adjudicated. Res judicata.
I think they're right that the contract is unenforceable under Federal law, it's probably more a question of whether that court is the proper venue, or what law applies to the case, Federal, Illinois, New York, or California.