It's true, they have removed the mistlands from the game. They said they only wanted 5 biomes and are ditching the rest completely! Quality over quantity, right?

Sorry, I'm being a stinker. I'm not sure what made them decide to clear the land in the public builds (wouldn't it suffice to just remove all that stuff in the test builds?) but if you watch their most recent fireside chat interview you'll get a bunch of sneak peeks for the mistlands as well as the mountain update, including a spicy new set of armor and potentially a new rug!