"Marion Cotillard in Batman 3. The actress, who is expecting a child in the spring with Guillaume Canet, will be scarce this year. She'll do a single film and her choice fell on Batman 3. This blockbuster produced by Warner Bros. enables her to work with the director Christopher Nolan, with whom she had turned very successful sci-fi Inception. Marion Cotillard will join the filming this summer in Los Angeles. She will share the bill with Anne Hathaway."
It isn't clear what role Marion Cotillard would play, if she is coming aboard. There has been speculation that Talia al Ghul will appear in The Dark Knight Rises, so it's possible Marion Cotillard could be up for that role.
The Dark Knight Rises starts shooting this spring.