It seems unlikely - "Curse of Strahd" seems as close as we'll get to a Ravenloft book, and I'd expect other settings to be covered in much the same way.
There's a notion that the "Big Book of Rules" that's coming might have the rules required for the various settings, which would be nice. But, of course, that's just something a poster here came up with that sounds cool - there's no actual evidence for it one way or the other.
And the other hope, of course, is that WotC may well open up other settings to the DM's Guild at some point, in which case something might happen there.