ACT2 looks more like a dungeon encounter, the Dark Lands tower, not Baldurs Gate
I think Baldur gate is Act 3 and there will be more then 3 acts.
You think so?
Act 2 in Larian games tend to be very large and hefty. I would be pretty surprised if it were limited to a dungeon encounter. I really got the feeling that Baldurs Gate would be next as most NPC's have "things to do there" or will "see you there."