As much as I would love this to happen, I don't think it's likely. I recall the White Stripes approached LEGO with an idea for a White Stripes LEGO set, around the time of their "Fell in Love With a Girl" music video, and LEGO turned them down.
Of course, time has passed since then, and LEGO more actively targets older builders (not to mention the White Stripes are more popular!) so maybe more musician-based minifigs could happen. I hope they do.
I want my LEGO city to feature more than just construction workers and emergency personel!
You know that "Community Workers" set of minifigs? I could see LEGO creating a set sort of like that, but not just with workers - a "Community People" set, if you would, which could feature musicians, artists, mimes...I would totally buy that for my town. The "Community Workers" set puzzles me, a little bit...I mean, every town needs more minifigs, but why give us a set of minifigures we already have too much of? I could see a "Community People" set selling even better than "Community Workers."
Or else LEGO could make a "Central Park" set - a green baseplate with trees, a gazebo, and some park performers. I can see AFOLs (sadly, probably just AFOLs) eating that set up, if it was priced right.
I collect LEGO themes that start with "C." And Pirates. I call them "Corsairs."