A painful thought:
If pro RKBA folks bring suit against HCI or some other group and/or government entity with the purpose of restoring the 2nd Amendment to it rightful status, this would require repealing existing GC legislation. Then, numerous people would have to work together in accomplishing this (read conspire by the ruling regime). Therefore, this could be prosecuted under the 1973 (?) RICO act, probably being considered conspiracy, and possibly a continuing criminal enterprise.
I think this is a long shot for the antis, but after what I have endured since 1992 I would NOT be surprised.