After looking into it I can't find much evidence of the band Dethklok causing a Metalacalypse. What I can find is that the anti-Dethklok task force is convinced this is going to happen, and soon. They're so sure they've kidnapped one of the guitarists, though why they haven't killed him is beyond me. They want the band alive because they're too famous to kill, but then what could they do with them? The band is preparing to launch a rescue attempt which I intend to join. Though what I'll do if this innocent and oblivious band really will cause the end of their world, I don't know.