We have an elected legislature who is the sole authority for this change.
Furthermore, we don't have a 2A because of Heller. Heller didn't apply anywhere except in Washington DC, and the Federal Lands. The decision that incorporated Heller against the States was McDonald v. Chicago.
Neither of those decisions would have been necessary had the Supreme Court not meddled in the first place, in United States v. Miller (1958) in which the Supreme Court improperly--and deliberately--misunderstood the application of "militia" in 2A.
Courts need to keep their noses out of things that are none of their f****ing business.
If you’d citing the case I think you are, you’re off a couple of decades.