There’s a long association of Batman and spies, especially in the caped crusader comics drawn by Paul Gulacy. Christopher Nolan seems to share that viewpoint; he’s said as much in countless interviews, and it certainly shows in his films. I felt his Batman Begins owed a lot to the Roger Moore Bond movies (in scope, not tone), and Nolan turned Wayne Enterprises CEO Lucius Fox into Batman’s Q. (Clearly, he felt a need to answer Jack Nicholson’s famous rhetorical question, "Where does he get those wonderful toys?")
Garth at Dark Horizons recently asked Nolan, "You've said you're a big fan of James Bond. Did you purposely put in some of more of that secret agent stuff into this film because of that?" and the director gave an interesting reply: "Well, we certainly did in both films. We started it in Batman Begins, and I think the Bond films are a big influence tonally. In terms of trying to explain to the studio, you know, if you look at the early Bond films you've got extraordinary things happening. But there's an overall tone you can buy into as a regular action movie. You're not completely stepping outside the bounds of reality."