So, Luvian and Wedin, how do you explain Baldur's Gate: Dark Alliance? I'm not saying that there will be a BG3, but I wouldn't be very surprised if, in the reasonably near future, another D&D-CRPG comes out carrying the title
Baldur's Gate: (insert-a-mysterious-sounding-phrase-here). It would be a great marketing-trick, hitch-hiking along with the enormous success of the series, even though the only thing it really has in common with BG1/BG2 is the fact that it takes place in the Realms.
I agree with you in that the Bhaalspawn-saga has ended, as I said in my previous post, but, as I have said in that post too, this does not completely exclude the possibility of a prequel.
Now as I said, I've only heard very few rumours of BG3, and even those were more like wishful thinking of fans than real rumours, so don't get your hopes up.