Your thesis vis-à-vis Amphastar’s suit against the FDA has some merit, but I find it less plausible than the scenario outlined in #msg-59172130.
I would be willing to bet that, behind closed doors, FDA staffers describe Amphastar’s lawsuit as a complete joke. I would also be willing to bet that, behind closed doors, Teva’s executives are seriously worried about the corporate harm that might ensue from legal discovery in NVS/MNTA’s patent-infringement suit.