Yep I think the posters here are on target. I would have loved a new biome, boss, and mobs each quarter or so, so the game is flushed out in a year, but I dont think its going to happen.

As far as Mistlands go though, its so darn dark in there. I've finally made peace with how dark the Swamp is, but Mistlands are really dark. At a certain point, thats just not fun