I don't think a thread has been started on this rumored game, so here we go.
I'm a huge GnR fan. I was a little too young to see them live in the their prime, but ever since I heard the first notes and primal scream on Welcome to the Jungle, I was hooked. Obviously the thought of a modern pin (and one by JJP) has me pretty excited.
Slash being a big pinball fan and potentially directly involved, like he was with the Data East game, makes the potential for this game that much better I think.