Green Day: Rock Band. Speaking to Plastic Axe, Rock Band project lead Chris Foster revealed that Green Day won't receive any DLC beyond the 21st Century Breakdown tracks that are already available on the Rock Band store. According to Foster, Harmonix has crafted "sculpted experiences for every single song" complete with specific animations. Unlike the dreamscapes of The Beatles: Rock Band, the work that's been done on other tracks can't simply be reconfigured for Green Day.
As such, Foster said that the team decided instead to focus on rounding out 21st Century Breakdown with the already available tracks, which will feature their own motion capture, assets and bonuses that fully tie into the game. Maybe not the best news, but it's not like the band sings about the boulevard of fulfilled dreams, does it?