I like CGI's guesstimate. Fable 2 only hit 3.3m with some serious bundling. I hope M$ will do the same with this far better offering. It will take some GOTYs which makes for a nice title. A promo this holiday and more as ME3 gets close.
While I am definitely immersed in a role with this game, I understand it's not what RPGs used to be. Maybe having DA in the stable let Bioware move away from tradition with this IP? Some of the changes were $uggestions from EA no doubt. Amazing game by whatever name.