In a fanfiction, Batman could be at the diner to meet an informant. He orders a coffee and waits patiently. When the informant arrives, they exchange hushed words over a plate of pancakes. The atmosphere in the diner is tense as Batman tries to extract crucial information without drawing too much attention.
Perhaps the diner has a special item on the menu that Batman discovers he really likes. This could lead to him becoming a regular customer, and over time, the diner staff start to notice his strange habits, like always sitting facing the door and leaving abruptly at times. As he eats, he might overhear conversations that give him leads on new cases.
One idea could be that Batman gains the power of super strength. He could use this to take on villains like Bane more easily, lifting heavy objects to block attacks or overpowering his foes in hand - to - hand combat. Maybe he gets this power from an experimental serum he was testing in the Batcave.
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.
One idea could be that a young fan makes a wish to meet Batman through a Make - a - Wish - type foundation. Batman then takes the kid on a tour of the Batcave, showing him all the cool gadgets and explaining how he uses them to fight crime. It would be a heartwarming story of a hero making a child's dream come true.
In a different scenario, Batman is transported to the realm of Athena in some sort of magical accident. There, he has to prove himself worthy to her. He learns from her about justice in a different light, not just the street - level justice he's used to in Gotham. When he returns to Gotham, he has a new perspective on how to deal with crime and corruption.
One idea could be that Batman is turned into a cat by a villain's new experimental device. As a cat, he has to rely on his natural feline abilities like stealth and agility to still protect Gotham. For example, he could use his cat form to get into small spaces in buildings to gather evidence or spy on criminals.
One idea could be that Batman captures Percy because he mistakes Percy's powers for something dangerous. Maybe he sees Percy using his water - based abilities in Gotham and thinks he's a new super - villain. Batman then has to figure out that Percy is actually from a different world and not a threat to Gotham.
Perhaps in the fanfiction, the Red Lanterns see Batman as a potential asset. They manipulate events in Gotham to push Batman to his breaking point, causing him to embrace the Red Lantern power. Batman then has to figure out how to use this new power without losing his identity. He might try to reform the Red Lanterns from within, using his own code of ethics to influence them.
One idea could be a team - up story. Batman and She - Hulk have to work together to stop a powerful villain who is causing chaos in Gotham City. Maybe the villain has some sort of technology that is affecting the citizens' minds, and She - Hulk's strength and Batman's detective skills are needed to figure out the source and stop it.
One idea could be that Batman teams up with The Incredibles to stop a new super - villain who has the ability to steal other superheroes' powers. The story could focus on how the two very different superhero groups with their own methods and ethics work together.