After an early footage leak, the game is confirmed at the Spike TV VGAs.
Harmonix has announced that the next Rock Band title will be Green Day: Rock Band. At tonight's Spike TV Video Game Awards, the band themselves announced the game. A video was shown that featured Rock Band avatars styled as members of the band playing the song "American Idiot", while a "Green Day: Rock Band" logo was displayed.
Joystiq had stumbled across the video earlier in the day, however it was pulled shortly thereafter. Speculation that the game would soon be announced was further fueled by GameTrailers TV host Geoff Keighley, who said in a VGA teaser that, "You gotta tune into the VGAs to see the announcement of the next Rock Band game."
The game will be only the second band-specific Rock Band title, following this year's The Beatles: Rock Band.