I have a hunch that if HMX was interested in doing another band-centric title...that is something that U2 has been holding out for. Honestly, I don't think a U2-centric title would sell any better than Green Day did.
I think Zeppelin and Metallica could support their own games. Unfortunately, one isn't interested, and the other's already done it.
Every other band is tilting at windmills if they think they're getting their own game that will actually be profitable for the publisher.