You shouldn't let San Diego Comic-Con pass you by without interacting with a true comic book legend, and who better than Jerry Robinson? He's best known for working with Bob Kane and Bill Finger on, arguably, the greatest comic book character ever invented: Batman. But not only was Robinson a seminal artist on the Dark Knight, he was also credited with creating the greatest comic book villain, the Joker. Then, credited with co-creating the greatest comic book sidekick, Robin. If he's doing sketches, you won't even want to know what the wait is like, but you should at least stop by and tell the guy "thank you."