Ozzy Osbourne's headed to Hell again -- although we're not yet sure what that means. The Black Sabbath frontman has posted a note on his Facebook page that Ozzy Osbourne's Hell Gate is "coming October 2015" -- but doesn't indicate what it is. Some fans are speculating online that Osbourne will be involved with Universal Studios Hollywood's annual Halloween Horror Nights, which last year featured a special maze inspired by Black Sabbath's "13" album. So stay tuned. Meanwhile, Osbourne will release his new solo retrospective "Memoirs of a Madman" on October 7, featuring 17 of his hits along with a two-DVD set of music videos, performance footage and interviews.