Iron Gate assure us it's coming but they're not quite ready to set a date for The Mistlands update to Valheim. So we don't have a date but we do have some more info, plus some extra screenshots.
They mentioned how they're tweaking progression for Mistlands, to ensure it feels rewarding. They've put plenty of work into making some creepy cave dungeons but they needed a real purpose. So now they've added a "special extractor item" that you will use to process a new Black Core but they won't say what it's for yet.
If you make a new character, there's also going to be some new hairstyle options too:
And of course there's going to be some fancy new outfits to go along with it all too: