Hopes were raised when a trailer and promises of a new season of Metalocalypse spread on the internet a couple of days ago, but they were swiftly executed when it was confirmed that this was a bunch of bologna. Co-creator and the beating heart of the show, Brendon Small tweeted that the whole thing was a mix up, that season 5 had been turned down by the network, and that he doesn't know why the update ever got posted. There was also this cryptic tweet about the fate of Dethklok:
That could be promising, but it doesn't change the fact that fans are pissed and want Adult Swim to know about it, so there is a petition currently growing by the minute meant to do just that. You can see and add to it here. Let them know how you really feel!