Burbank, CA – June 21, 2023 – It doesn’t get more metal than this! The long-awaited return of Adult Swim’s favorite heavy metal adventure, “Metalocalypse,” arrives with an all-new, full-length animated movie. Written and directed by series co-creator Brendon Small, “Metalocalypse: Army of the Doomstar” brings the heaviest metal band ever created back together again …