For those out of the loop of animation history, Don Bluth was an animator at Disney during the dark age that left to form his own studio where he aimed to make films that matched the quality of the Disney films of the 40s and actually succeeded. As of the Fox buyout, some of his films have ended up under Disney’s IP list. Only problem I see now is that his most famous work was not included in that list but I’m sure Disney could work something out