Van Halen pin would have to have the red/white/black Frankenstrat pattern on the cabinet. Easily recognizable from a distance. I honestly can't believe this hasn't been made already. Either the license is too expensive or the band is not interested in doing it.
There are few themes I would buy sight unseen, but VH is one of them.
GnR on the other hand is only slightly appealing to me. Mainly because I know just how freakin' awesome JJPOTC is and the heavy rumors are the same designer and coder are on board.