The new “Metalocalypse” film, “Metalocalypse: Army Of The Doomstar,” will be receiving a Blu-ray/digital release on August 22. Notably, a new Dethklok album, titled “Dethalbum IV,“ will arrive on the same day. The soundtrack for the film will be available on August 25. For now, you can check out a new Dethklok song, titled “Aortic…