3. Hans Zimmer's Soundtrack References
A smart Easter Egg from Batman Begins composer Hans Zimmer, who used the soundtrack listing not only to reference 12 different breeds of bat (using their Latin names,) but also to spell out the word "Batman" with the first letters of tracks 4 to 9. Though it isn't the type of Easter Egg that adds anything to the film itself, it's a smart bit of fan-baiting by Nolan and Zimmer, in Nolan's usual tradition.