reason: Katie Holmes might have a cute face, but Maggie is much more of an actress, she should've been there since the beginning. But then again, who knows, if she were in Batman Begins, she might be married to Tom Cruise today. Not a good idea.
reason: People pick on Sofia Coppola, saying she was by far the worst thing on The Godfather Part III. I don't think so. At the time she was unexperienced as an actress (and probably still is), but I think that lack of experience brought a vulnerability to the character, that any 18 year-old has. Mary was supposed to take over her father's business but deep down she had no idea of what to do with such a huge power, she was completely overwhelmed with it. Her casting wasn't mere nepotism.
reason: Lazenby did a great job and delivered one of the best lines of the series, but Connery saying goodbye to the franchise with the death of Bond's wife would be awesome. And the film has the right ammount of comedy that would give Moore a good job. And it would also help in the continuity of the series in any case.
reason: Lucas did here the best film of the new trilogy, but Fincher would make it much darker, just the way to then, reach the quality of the old trilogy (but I might have to reconsider it, after being disappointed with The Curious Case of Benjamin Button).