Cool, about time we start hearing some news. As much as I don't think Maggie is that cute, she does look somewhat like Katie Holmes so she works as Rachel Dawes.
And although Aaron was my first choice for Hank Pym/Antman I'd be happy to see him as Dent. Too bad Liev Schrieber, Joaquin Phoenix, Guy Pearce, John Cusack, and others didn't make it, but Aaron Eckhardt is versatile enough to make the role his own and now if they can just get Brian Cox for Rupert Thorne, Ray Liotta as Sal Maroni, and Bob Hoskins or Timothy Spall for Penguin (ok I know he's not in the movie) and maybe Jolie or Charlieze Theron for Catwoman than we got ourselves a really kick-ass Batman sequel.