Rock Band Blitz: Harmonix reveals controller-driven update for summer release

With Harmonix's Rock Band having barely emerged alive from the Plastic Instrument Wars of 2008, the former's no longer bound by its feud with the Rock Band franchise, which threw its final horns last year ( Activision ends the Guitar Hero franchise ). Now there's no competitor at its heels – and a diminished audience asking, “what next?” – the developer's free to take its signature series wherever