Harmonix moving resources onto new projects.
Over 1,100 songs included in Rock Band's 50% off sale.
Viacom is suing Rockband developer Harmonix for $131m, claiming a miscalculation was made during its 2006 acquisition of the studio.
Future music games expected to sell more than the previous generation.
Five years from now being a rock star will be just one implementation of the category.
The Harmonix founders received $150 million last quarter and will receive a further giant payment in 2009.
EA has no 'confirmation or announcement' following US release on Sunday.