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.
Perhaps in the fanfic, the villains' reactions are explored. They might target Bruce Wayne more directly, putting his loved ones in even greater danger. This could lead to new alliances and strategies for Batman to protect not only the city but also his identity.
Another aspect could be how the Bat - family copes with the revelation. For example, Robin might have to deal with the fact that his mentor's secret identity is now public knowledge. This could change their dynamic and the way they operate in Gotham.
One possible plotline could be the chaos that ensues in Gotham when Batman's secret identity is revealed. His enemies might target his loved ones directly. For example, the Joker could go after Bruce Wayne's family and friends in a more brazen way than before.
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.
One interesting plot could be Batman's true identity being revealed to the public in a very unexpected way, like through a high - tech hack of all the city's communication systems. This would put him in a very difficult position as he has to deal with not only his enemies knowing who he is but also the public's reaction.
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.
One interesting idea could be how Danny's friends react when his identity is revealed. They might be shocked at first but then quickly adapt to support him. Another could be the reaction of the villains. They may become more determined to defeat Danny since they now know who he really is.
In fanfic, his identity reveal could also lead to a public outcry. Gotham's citizens might have mixed reactions. Some could see him as a hero who has been secretly protecting them, but others might fear his power and the fact that he has been operating outside the law. There could be calls for his arrest or for more government control over vigilantes.
Obviously, Batman/Bruce Wayne himself. His butler Alfred would also be heavily involved as he has always been there to support Bruce. Alfred would likely be trying to protect Bruce and keep his remaining secrets safe.
In some fanfic, he could choose to face the situation head - on. He would use his intelligence and skills to counter any threats that come his way due to the identity reveal. He might try to turn public opinion in his favor by showing that his actions as Batman were always for the good of Gotham, despite operating in secrecy.
Obviously, Batman/Bruce Wayne himself is a central character. His life would be turned upside down by the revelation of his identity.
One idea could be a story where Batman has to team up with his rogues gallery to fight a greater threat from outer space. Maybe the Joker, Two - Face and the Riddler are forced to put aside their differences when an alien race starts to invade Gotham. They find that Batman's strategic mind and their own unique skills are needed to save the city.