With the upcoming release of Cinderella III on Feb.6th 2007,
The Official Disney DVD Website has a 8 minute preview of the "what-if" storyline. http://disney.go.com/disneyvideos/animatedfilms/cinderella3/
The animation actually looks like the original film and the story seems like something the whole family will enjoy.
In the preview, it reminds me of The Little Mermaid a little.