From The UK's The Guardian:
http://www.guardian.co.uk/film/2008/aug/28/cher.catwoman
If you thought all those tabloid rumours about Cher as Catwoman and Johnny Depp as the Riddler in the next Christopher Nolan Batman film might be a little spurious, Dark Knight studio Warner Bros have confirmed that you are absolutely right. In an in-depth feature for the
Hollywood Reporter about the making of the superhero megahit, producer Chuck Roven said Warner were keen to push on with another film, but added that the decision would come down to Nolan, who is currently on holiday. "There are a lot of us who emotionally would love to do it," he said. "But it's really Chris' call. Chris is the kind of film-maker who just doesn't think about the next movie before he has completely finished the movie he is working on." Roven added: "When he comes back, we will see how he feels."