A new chapter in the Judas Priest legacy is about to unfold on the big screen. The Ballad of Judas Priest , the upcoming documentary about the British heavy metal pioneers, will receive its world premiere next month at the prestigious Berlin International Film Festival (Berlinale) , one of the most respected film events in the world. Photo: Judas Priest Co-directed by acclaimed documentary filmmaker Sam Dunn and Rage Against The Machine guitarist Tom Morello —in his director