In a perfect world, Burton and Miller would co-direct, going right from the original book, with only a few changes, if any at all.
All of Burton's players, Christopher Reeve as Superman.
But then again, this isn't a perfect world.
Miller hates Keaton as Batman, as far as I know, only because of Keaton's physical inadequacies. If Miller ever directs the film, he won't be picking Keaton, which is unpleasing to me. For me, either Michael Keaton or Adam West are the faces of an aged Batman, and damn it, one of them should be entitled to the role!
I'd love to see DKR with Adam West (Though he's obviously WAY too old now). I've seen enough out of him to know that he's got a serious Batman in him. His performances in the last seaosn of Superfriends was astounding.