Rock hinted during a Fuse TV interview this week that he collaborated with Eminem on an upcoming record but no such project has been officially announced.
"Uh, I can't really say," Rock said in the Fuse interview. "Hey, hey, I was on the Kanye [West] record; maybe I'm on the Eminem record. You never know."
Rock's vocals were featured on West's 2011 track "Blame Game," E! News said.