What I think is strange is that nobody seems to have noticed the issue of licensing that would concern anyone wishing to remake BG.
As far as
remaking is concerned, that's kind of a grey zone as far as I see it. Otherwise they wouldn't be able to repackage BG for Magog or those "complete editions". All it takes it to convince the parties involved the property is the same old IP, not a brand new product they'd have to license anew. As to where a line is drawn between a patched reissue with one byte changed and a brand new game with new engine, new art and new content, that's for attorneys to decide. I'd figure with all content being reused from the original and all art being replicated from the original, chances are it will pass as legit. The only truly brand new part would be the code, and code has nothing to do with IPs.
But you can bet there will never be a commercial BG3 using 2nd edition, that much is obvious.