Which Fantasy Was Too Heavily Sanitized For Mainstream Audiences?

Mention "Disneyfication" and everybody knows what you're talking about. But the phenomenon of sanding all the rough edges off fantasy stories goes way further than cartoons, into every area of pop culture. What's the most horrible case where a fantasy lost all its darkness or complexity, to make it more popular?

Please include a picture, clip or book cover for your chosen fantasy. And please mention the name, and details of how it got sanitized for your protection. Thanks!

Top image: The Little Mermaid. They changed the ending and turned it into a cute musical.