The Batman: 15 Details You Missed The First Time
10. Colson's License Plate
Gotham district attorney Gil Colson (Peter Sarsgaard) ends up kidnapped by the Riddler and forced to drive his car into the church where Don Mitchell Jr.'s funeral is being held.
For a few fractions of a second we get a good look at the car's license plate as it crashes into a pillar, the plate reading, "S39 7WD." This might seem like any old license plate, but it's actually a coded message - a cipher, even - for attentive fans.
Let's start with "S39." S is the 19th letter in the alphabet, and so S + 39 = 1939, and 1939 is the year in which the first Batman comic was released.
The second string, "7WD," is a little trickier. 7 actually represents "DC" (D being the fourth letter and C the third, so 4 + 3 = 7), while W and D are the 23rd and 4th letters respectively, adding up to a total of 27. "DC27" refers to Detective Comics #27, the first comic that Batman appeared in.
Put it all together and the license plate is code for 1939 Detective Comics #27. A riddle the Riddler himself would be proud of.