Gotham Crusaders--- Alfred literally doesn't had to stop buying comic books when I got engaged to save every penny that I could. How is Barbara Gordon Batgirl again when she was paralyzed from being shot by the Joker (in The Killing Joke) for so many year
Evolution of the Batmobile -- I have always loved the original 66 for the fact that it would be the easiest to fix/replace. Throw a diesel in for even simpler operation. But that would not sell tickets.