More bands have been added to next year’s Wacken Open Air festival. The event will be held in Wacken, Germany on July 29 to August 1 and it will feature the following: Def Leppard, Judas Priest, Powerwolf, Hämatom, In Flames, Savatage, Arch Enemy, Saxon, Emperor, Lamb Of God, Running Wild, Airbourne, Sepultura, Europe, Black Label…