Other than the fact that the D&D franchise has a multitude of other settings that they could have jumped into? I mean the BG story is really told at this point - no need to come back to it.
This is why ME4 - despite probably being a total piece of garbage - will sell well. People get nostalgic instead of moving on to a new story and experience. You are enabling companies like EA and bad works like that when you pine for a continuation of a story that is complete.
