I pretty much understood right away that this was a new story in the same world as BG ...which is Faerun. I am personally happy to return to this world. It is my favorite setting.
Many may not have responded as well to another name, so it worked well as a draw. I don't feel it was deceptive as much as associative. Since there has been no money collected and plenty of sample footage, everyone can decide whether or not this is a game they will like before they buy it.