LOL!! Are you insane? It will be even more vocal than the original bill being signed, because GW will re-sign it. Anyone who thinks he wont is out of their minds. The government NEVER gives back something they have stolen. No president will ever let this sunshine. The AW ban just gives them too much power.
This is a bizarre legal challenge to the "assault weapon ban", and if I were a lawyer I'd probably be arguing against it myself, even though I'm a very staunch RKBA defender.
The best attack on the AW ban, which no one has yet successfully brought into court, is on Tenth Amendment grounds -- Congress simply doesn't have the constitutional authority to ban any object it doesn't like, which is *exactly* why the Prohibition of alcohol required a constitutional amendment.
Even the federal drug laws don't actually simply ban possession/sale of illegal drugs, they only outlaw *trafficking*, which is the smuggling of drugs into the country (constitutional via the feds' authority over "foreign commerce") and/or across state lines (constitutional via the interstate commerce authority).