They should probably just go ahead and change the law before wasting taxpayer money defending a lost cause. Declaration of a state of emergency does not mean you give up your civil rights; if this is successful, it should prevent shenanigans like the gun grab in the aftermath of hurricane Katrina.
I said Alan Gura was devious; it looks like he’s got a plan, and he’s working his way through it step by step. Being in his way just results in a loss of taxpayer money, as D.C. and Chicago can attest; if they hadn’t had unconstitutional restrictions on basic civil rights in the first place, they wouldn’t have had to spend money defending those restrictions.
If you want to read about how the 2nd amendment came to be such an issue, Kevin has an uber-post that goes into as much detail as you can probably stand; it’s around 13k words and is meticulously researched and cited, and takes you through RKBA history from the early 19th century to the present. Read the whole thing, as they say.