I doubt it'll be GIMP, but i'd like to see a program that follows the UX of Paint Shop Pro (especially PSP7, the last good version IMO before they rewrote the UI and then sold it to Corel that gutted it out) which i always found much easier and more intuitive to use than both Photoshop and GIMP.

For a little while i thought Krita would be it, but i quickly realized that they just copied Photoshop for the most part.