jerk99 wrote in with a link to a post on the ScoreHero message board
where someone cracked into the .bin file from a recent Rock Band DLC pack, and unearthed a list of songs that Harmonix has worked on for Rock Band and may likely release as future expansions. A number of the songs have already been announced, including the NIN tracks March of the Pigs, The Collector, and The Perfect Drug
. From the looks of this list, you'll also be able to rock out to the entire album Nevermind
by Nirvana, and more classic tracks by the Who and the Rolling Stones.