Harmonix is working on Green Day: RB
In "partnership" with others.
Rock Band creator Harmonix will help to create the new Green Day: Rock Band spin-off.
Yesterday's assumption that Demiurge - a track pack maker - would be the sole developer was incorrect.
"Green Day: Rock Band is being developed by Harmonix in partnership with Demiurge, MK12 and others," Harmonix told VG247.
Green Day: Rock Band will be released this year on PS3, PS2, Wii and Xbox 360.