There was gonna be a 'Guitar Hero' MMO
 

In the five years following the first Guitar Hero, Activision sought to flood the market with variations on the theme. But if the company hadn't swung the axe in 2011, we were even going to get a massively multiplayer online version of the title. Uns...

http://www.engadget.com/2016/04/18/t...itar-hero-mmo/