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I seriously hate this woman. Her role as Storm wasn't big enough, so she's pouted her way out of the third X-film, she's won an Oscar and so her ego's exploded, and now, once Catwoman has bombed, she's done with the genre.
As for her comment about coming back to Catwoman -- bullshit. When a film doesn't even come close to breaking even, there's no chance for a sequel and she knows it. It's her polite, Hollywood way of not admitting it sucks.