10. They Could Ditch The Cardboard Prison Trope
The whole villains get locked up then reappear with no explanation gimmick is really old now. A live-action show with some sense of continuity and realism would have to account for the whereabouts of all its characters, rather than having them reappear out of the shadows like fairy-tale monsters. I always felt that a villain escaping or re-emerging should be a genuine event, an exclamation mark rather than a comma. Having Arkham Asylum or Blackgate Prison be revolving doors that only inconvenience super-villains is deeply silly in live-action and so obviously artificial that it brings me crashing out of the story. One of the things that Arkham Asylum did well was evoking the fear and danger of Jokers mass breakout, the sense of the walls of order crashing down to unleash the forces of madness on the world. In order for a TV show to properly thrill, Batmans victories have to mean something, which means a sparing, and therefore more effective use of iconic villains, and a genuine sense of dread, of a great evil re-afflicting the mean streets of Gotham, when they eventually return two seasons later.