I will guarantee it will sell well. There's already alot of hype that Dragon Age is the spiritual successor of Baldur's Gate series with the game being penned and lead by the same designe, David Gaider. Plus its typical cliche fantasy setting that everyone could digest easily like bigmac, not some Eastern wanna-be setting.
I have faith Obsidian learnt alot of things during Neverwinter Nights 2's erratic development progress. Obsidian conceded of some mistakes they made which involved putting too many eggs in one baskets during the development and an unforeseen problem of the electron engine and the core of the aurora engine being incompatible. Furthermore they said that if there are any future games involving tool editors, their highest priority would be making tool as an accessible medium for many people instead of the one in Neverwinter Nights 2.
To be fair, its not entirely Atari's fault but rather a share of Obsidian's faulty management due to uncapped ambition. There were two lead designers for the game before J.E came on board which is difficult to grasp consistency in the project. They tried to add lots of classes without fixing the old ones first since they were given old Aurora build. The stripping and recreation of the graphics engine that still runs slowly for today's standard. The game was delayed for additional six months remember? Anyway.
Why not? The game started off in Pen and Paper RPG format in 1987 under the name Warhammer 40,000: Rogue Trader.
http://en.wikipedia.org/wiki/Warhammer_40,000:_Rogue_Trader