Cher as Catwoman?

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I was listening to a usually reliable talk show in Dallas yesterday who reported that Nolan wants to cast Cher as Catwoman. I have no idea how true this may or may not be, they went on to say he would like to cast Johnny Depp as the Riddler and Philip Seymour Hoffman as the Penguin, though it wasn't clear which of the 3 would be in the next film.
It's obviously an intriguing choice, I gotta say I like the direction. I can't think of any young actress in Hollywood who makes me say "Wow, she could be Catwoman and be good." This could turn Catwoman into a character we haven't seen before and flip the traditional role on its head.