To date, the biggest Guitar Hero game of 2009 has been Guitar Hero: Metallica, the first full-band installment in the series to be based on a single group. However, a subsequent installment in the series may very well contain tracks from Guitar Hero: Aerosmith--the first band-focused GH game--that use more than just a virtual six-stringer.
Speaking with analysts in a conference call today, Activision Publishing CEO and president Mike Griffith announced that the publisher will be releasing "a separate Greatest Hits compilation Guitar Hero game that includes full band versions [of previously released songs]." Though no specific titles were mentioned, the Greatest Hits will likely draw on all prior titles in the Guitar Hero series, which began with the eponymous 2005 original game for the PlayStation 2.
Guitar Hero: Greatest Hits will be released for the Xbox 360, PlayStation 3, and Wii before the end of 2009. The year will also see the release of a third Guitar Hero game for the DS, following last year's Guitar Hero: On Tour--the top third-party game for the platform--and its sequel Guitar Hero: On Tour Decades. Activision did not say if the new GH DS game's peripheral would use the GBA slot, which is not present in the forthcoming DSi model.
Greatest Hits and the new Guitar Hero DS game will also be joined by DJ Hero, which will arrive on the Xbox 360, PlayStation 3, and Wii sometime in 2009.