@bk69
Now, publish a Song of the South porno and watch the full weight of The Mouse come down on you.
That is actually Public Domain also. The Joel Harris stories by Uncle Remus were actually first published in 1881. All of the stories are free to be used by anybody.
However, if you notice the copies that are made, great care is made to avoid copyright issues. For example, before Disney, the dwarves in Snow White are never named. Therefore, Sleepy, Doc, Dopey, and the rest are all Disney copyrights.
This is why in 1980 Filmation got sued when they released a sequel to the original story (they had changed the names barely enough to escape, but the movie which was made for TV was only shown once). And when they made another one a decade later, they replaced all the dwarves with female dwarves.
Ultimately, the decision to return to public domain stories was for several reasons. Their "licensed" stories (the Silver or Bronze age, Black Cauldron, Fox and the Hound, Mouse Detective, Rescuers) did not do all that well once royalty splits were taken into consideration. And their Renaissance of returning to such stories (Aladdin, B&TB, Mulan, etc) really marked the high point of the company.