It's safe to say that Activision has never been an innovator in the music game genre. It bought its way in by purchasing Red Octane, and the rights to the Guitar Hero franchise along with it. Harmonix, the original developer of Guitar Hero, went on to create Rock Band, which Activision subsequently cloned with Guitar Hero World Tour. So just how successful could DJ Hero be with nothing to base it off? According to Gizmag's Tim Hanlon, very.