"We were pleased with the performance of Beatles: Rock Band, but we were expecting higher sales," Guthrie said. "Our core audience of 16- to 34-year-old males are much more familiar with Green Day music than The Beatles." Targeting the core gaming audience with a band active during their lifetimes certainly seems like a sensible business move, though it does signal a move away from the kind of market expansion MTV and Harmonix were attempting with Beatles. However, Guthrie's suggestion that "Green Day probably has a much higher awareness than perhaps The Beatles did" seems like a stretch. Everyone knows The Beatles.
The clear market advantage that the Green Day game does have is the benefit of being compatible with Rock Band's existing and ever-growing library, as its tracks are exportable (for a fee) to Xbox 360 and PS3 hard drives and playable in the main iterations of the series. Though Guthrie didn't say as much, it's possible Beatles sales suffered because the game was a standalone project, which didn't mesh well with the Rock Band ethos and its core demographic.