Well, considering there are, what, 80+ combat encounters just in EA, compared to the 22ish-whatever combat encounters in DoS2 EA...there is a high likelihood of dungeons. Unless all the encounters are in the same area...I mean, we already know of 2 dungeons; the crypt in the first ever playthrough video, and the cave in the goblin camp. Not to mention the entire Underdark area. So I think that you can be rest assured your desire for dungeons will be sated
