It's a long way off, if ever, I think. It doesn't seem like Larian's official tools will allow for any real substantive changes, like adding characters and quests to the main game or new campaigns. So it's keeping an eye out for unofficial means. But even then, of course its not as simple as creating mods for BG1 or 2 - back then one person could easily bash out something in little time. Now you'd have to figure things like voice acting - I know some people would suggest using AI for it, although its not something I'd be completely comfortable with. So yeah, all very hypothetical at this point.
But for now I will continue to write most of a script (as a creative, working on fannish things sometimes helps me figure out problems I've been having with other projects), maybe mock up some screenshots using the mods that there are.
