I haven't read deeply into Environments for D3. So far, to my knowledge, one of the Acts (or whatever WoW-like word meaning the same thing blizzard will (have?) call it.) will be at Caldeum, a baron Desert act.
The other being Tristram, which wont be an act obviously, just another environment.
The trailers show a dungeon leading out to an outside area (with a magnificent looking bridge), frankly I'm not a fan of the new art style, well, just of the outside in that particular area of the game. It is far too light for my liking. But back on track:
Inform me of any landscapes i don't know of, or just give your ideas on what would be a sweet landscape that would FIT IN with the Diablo universe. In my opinion, i think Diablo 2 covered all the great ideas and the only hope for a great game is to change the existing idea such as Caldeum changes Lut Gholein, but still has the same Desert idea. I personally would LOVE another act with a snowy mountain alpy sort of feel, like Harrogath; but woud really love any of Blizzards ideas (on landscape).
Hopefully you guys can change my mind or inform me on some stuff i don't know.