The revelation came during Wednesday's quarterly Activision Blizzard conference call with reporters. As noted by Kotaku, Kotick has previously stated the Guitar Hero music service, GH Tunes, has the potential to be one of the "credible alternatives to iTunes."

Perhaps boosting Kotick's rationale for monetizing the currently free service was the fact that Guitar Hero players have created approximately 25,000 songs since World Tour launched in September. Kotick made no mention of sharing the wealth with users whose songs became part of this hypothetical subscription service.

"The ability to offer these songs on a subscription basis may very well result in the newest subscription opportunity in our portfolio," Kotick said.

Just don't expect a cut of the profits if your Super Mario Bros. Guitar Hero theme makes it to the big leagues.