They might throw in a freebie item or craftable while we are waiting for Mistlands in the meantime, but nothing is set in stone yet. No release date or any indication of how far IG have progressed in completing the new biome yet, outside of a couple of posts & pictures.

Mistlands is looking good so far though, I'm thinking they might be further ahead with ML features & development then they are letting on. I guess we'll see soon enough.