I respect the man as a judge, and as a legal mind. Didn't agree with everything, but in my opinion, that's okay.
Here's the thing. To revers any of the 2A decisions, you need another case that would bring the issue before the SCOTUS. I don't know of anything currently pending before an appeals court. So, it could be years before the issue hits SCOTUS again. Not that this helps us in the long run.
Honestly, I think it would be very hard for a new SCOTUS to completely reverse Heller, and go from individual right to collective right, or none at all. I think "reasonable restrictions" are where they will go next, aiming for EBRs, or maybe all "high capacity" semi autos.