5. Don't Knock Us Over The Head With Comic Book References And Cameos Like Agents Of S.H.I.E.L.D.
Alright, Agent Coulson. You used to hang out with the Avengers. The Battle of New York happened. Asgard is a place. Aliens are a thing. Nobody watching
Agents of S.H.I.E.L.D. is in any danger of forgetting that it takes place in the Marvel cinematic universe because we are being constantly, relentlessly reminded. An abundance of Easter Eggs could be a big pitfall for Gotham as well, and I'm inclined to preemptively blame it on network executives. I'm imagining a meeting where some bosses are reviewing a script and they're like "Where's all the Batman-y stuff? Put some white make-up and lipstick on that one wisecracking henchman, he's the Joker now." I'm shuddering at the thought of Gordon walking into a flower shop and Poison Ivy is the florist, or into a pet store and Catwoman is working the register, or into a hat shop and the Mad Hatter is making hats. I'm not sure why he keeps ending up in all these specialty shops, but the people working in the specialty shops should definitely not be Batman villains.