I don't know if this would work. Right now, Winnie the Pooh has gone public domain, and if you've seen the reaction to "Winnie the Pooh: Blood and Honey" or a new video game called "Winnie's Hole"... most people
really, really do not like that Winnie the Pooh is being expanded in the horror direction. Some are even calling for copyright to be eternal because the public is showing that it cannot handle public domain responsibly. There's even a growing argument that copyright actually prevents unoriginal ripoffs and shock content
more than it stifles creativity.
Emotionally, I do understand the sentiment. Especially when more content like Mickey Mouse or The Hobbit (in Canada, just the books, next year) go public domain - I wouldn't be shocked if we get calls to just abandon the concept of public domain from how companies are using it.
Let me be clear: I still support Public Domain. I also think people who make slasher films using childhood characters are the most perfect method you could devise, if you were a corporation, to make people mad at Public Domain's existence. If I were Disney and somehow capable of sending money anonymously, I'd pay for the creation of as much awful Winnie the Pooh content as possible; then send a letter to a local senator asking for Congress to investigate restrictions.