Looks like the images of Mickey and Minnie mouse, the iconic mouse couple of Disney, are now available to the public in the US after Disney’s copyright expired. Consequentially, creatives like cartoonists can now rework and use the earliest versions of Mickey and Minnie, without permission or cost.
However, do note that more modern versions of Mickey are still covered by copyright.
The film Winnie the Pooh: Blood and Honey came about as the result of AA Milne’s Winnie The Pooh entering public domain.