Adult Swim is about to unleash a new cartoon called "METALOCALYPSE" in August.
"It's about a Norwegian heavy metal band called Dethklok. Although they rock to the top of the charts with gusto, they are also incredibly stupid and leave a path of destruction and mayhem behind wherever they tour."
James Hetfield and Kirk Hammett — along with members of Arch Enemy and Nevermore — have lent their voices to the cartoon.
Teaser here .