Speaking at Microsoft's GameFest event in Seattle, Xbox Live general manager Eric Kilgore explained that while the Avatars--Microsoft's answer to Nintendo's Miis--are currently planned only to be allowed for use in titles rated E10+ and lower, that restriction may change in the future.
"We are still developing the final policies," Kilgore stated, as reported by Develop. "The final guide we have this year is to think of them in an 'E10' context. That doesn't mean it won't change--but this Fall they won't be able to blow each other's heads off."