This might seem like a silly question here, but would you buy an expansion to Bloodlines if it were somehow made? Obviously, there is an almost 0% chance that an official expansion would be made. I think we have to be content with a modding team creating one, and even such a feat as that seems a long way off, as from what I know even the modding tools that are released still have quite a few limitations.
I've been penning a story for a modest add-on, more as a hobby than anything, but if a saw a professionally made expansion, whatever the source, I wouldn't hesitate to download it.
Also, perhaps just to stimulate some lively discussion, what locations would you want your character to be able to travel to?