Rock Band/Music Game Pack or Expansion

So now they announced a Get Famous pack, you think they can implementing some of this into the game? That would be a great opportunity to have multiple careers, including bands trying to make it to the top and go platinum. So far I just saw a bit about acting; but they might give us more information from now until the release date.

Or at least add a bass guitar and drum set and we can sort of use the club system to sort of form a band.