Brendon Small confirms: Adult Swim passed on Season 5
Well, um, sh!t.
http://www.metalinjection.net/latest-news/bummer-alert/metalocalypse-c reator-says-he-wanted-to-do-a-new-season-but-adult-swim-passed-on-it
Rather bizarre of AS to do that when Metalocalypse has been one of their longest running programs with a dedicated fanbase. At least Small seems determined to do whatever it takes to finish the story elsewhere.
"DO NOT WRECK THIS GIGANTIC DOOM."