Bob Kane’s Autograph – Batman

Comic book Easter eggs are a dime a dozen in today's superhero-heavy climate, but they were a bit harder to come by a few decades ago. However, Tim Burton still included one such gem in his 1989 Batman film that pays homage to Batman co-creator Bob Kane. Near the beginning of the film, Alexander Knox walks through his office and is handed a sketch of the Batman that's been spotted around Gotham City. The drawing itself is a funny gag, but the signature below it is the best part, as it's the autograph of Bob Kane. To go one level deeper, the character that does the drawing is listed as "Bob the cartoonist" in the novelization of the film.