What happened to Metapocalypse?

The newest thing I've learned in Runet is the release of the album Brendon Small's Galaktikon II: Become the Storm, which, says Jean Hogan, can be considered an album by Dethklok. But first, it was already in 2017, and secondly, even if it can be called that, it's not Dethklok, and thirdly, that by the animated series? Adult Swim is still not allowed to do a sequel and Brandon small has been exploring other ways of its revival? What Metropolition happens now?

P. S. I Ask here, because I don't know where else one might ask.