I really don't think there is a new scan at all. I think it is just the same 2004 master, but taken from a copy that has something closer to the correct colors, before they got screwed up. This non-crappy version was then upconverted to 4k and further work done on it for the 3D release that didn't happen.

Maybe they'll do something with it in the future, maybe they won't. At this point it's impossible to say. But one thing's for sure: any hypothetical release of the unaltered versions is entirely unrelated to this.