Yeah, I love Mila but her voice is far too distinctive and she would need serious work to try and change it for the role. She does have the sex appeal, but I'm not sure I could handle listening to Meg Griffin, looking at Mila, as Catwoman.
Jane Levy's spiritual comicbook role is Mary Jane. I can't have her cast in anything else.
It will make me sad forever that Brittany Murphy never got a chance to play Harley.