One idea could be exploring what if Bruce Wayne's identity as Batman was exposed accidentally by a new high - tech surveillance system in Gotham. Another could be a story where Batman has to take on a new identity temporarily to infiltrate a secret criminal organization that has been studying his every move as Batman.
A great plot could involve a young protege who discovers Batman's identity on his own and tries to convince Batman to let him join the fight. Or perhaps a story where Batman's identity is stolen by a villain who uses it to create chaos in Gotham, making the real Batman struggle to clear his name while also stopping the impostor.
One idea could be that Batman's identity is revealed to the public due to a high - tech gadget malfunction. For example, his Bat - signal projector suddenly starts projecting his face instead of the bat symbol. Another plot could involve a villain using mind - control on Alfred, who then accidentally reveals Batman's identity to the wrong people. Maybe a young journalist discovers some very subtle clues and pieces them together to figure out Batman is Bruce Wayne, and then has to decide what to do with that information.
One idea could be that Terry's identity is revealed to the public. This would lead to chaos as his enemies target his family and friends directly. His mother might be in danger, and he'd have to constantly protect her while still trying to fight crime. It could also make his relationship with Dana more complicated, as she now has to deal with the fact that her boyfriend is Batman.
The Riddler's daughter could be an interesting addition. She could be a brilliant detective herself, but conflicted about her father's criminal ways and her own feelings towards Batman.
One interesting idea could be the reaction of Gotham's citizens. They might be shocked to learn that the wealthy Bruce Wayne is Batman. Some might feel betrayed, while others could see it as a sign of hope that someone so privileged is using his resources to fight crime.
One interesting plotline could be the reaction of Gotham's criminals. They might either be overconfident thinking they can now easily target Batman or be terrified knowing his true identity means he has more resources at his disposal. Another could be how Batman's allies, like Alfred, deal with the new situation. Alfred might be even more protective or start to worry about the safety of Bruce Wayne's loved ones.
Perhaps they could start off as rivals in the fanfiction. Batman from the present is skeptical of Batman Beyond's more high - tech approach. But as the story progresses, they learn from each other and become a great team. For example, Batman could teach Batman Beyond some of his old - school detective skills, while Batman Beyond shows Batman new ways to use technology in combat and surveillance.
Another idea might be that one Batman is from the future and has come back to meet his past self. The future Batman could show the past version some new technologies and tactics, but also warn him about the potential consequences of certain actions. This could lead to self - reflection for the past Batman and a change in his approach to crime - fighting.
A plot could involve a time - travel scenario where Batman and Supergirl are sent back in time to prevent a major event that would change the future of both their worlds. They would have to work together, using their different skills and knowledge of their respective eras.
One idea could be exploring the relationship between Batman and Robin in a more emotional depth. Maybe Robin is going through a tough time at school and Batman has to balance being a mentor and a crime - fighter. Another could be a time - travel plot where the Bat - family gets sent to different eras in Gotham's history and has to adapt and still fight crime.
One idea could be that Batman and Robocop team up to take on a powerful criminal organization that is using high - tech weaponry. They would combine Batman's stealth and detective skills with Robocop's firepower and law enforcement programming.