A great Bruce Wayne sons fanfic could involve the son traveling to another dimension. In this new world, he has to find his way back home while also dealing with the differences in how things work there. He might meet alternate versions of his family and friends. This would be a chance to explore his character in a whole new setting. It could also show how his upbringing in the Wayne family has equipped him to handle such strange and difficult situations.
One idea could be to have a party where all of Bruce Wayne's allies and friends from the Batman universe come together. There could be some unexpected revelations during the party, like an old friend having a secret identity. Another plot could involve Bruce reflecting on his past birthdays during his time as Batman and how his perspective on birthdays has changed over the years. Maybe he could receive a unique gift that has a special connection to his parents or his crime - fighting journey.
Obviously, Bruce Wayne's son is a central character. Alfred Pennyworth often makes an appearance as he is an important figure in the Wayne family. Dick Grayson might also be popular as he can act as a mentor or a brother - like figure to Bruce Wayne's son. And of course, the villains from the Batman universe like the Joker or Ra's al Ghul can also be included to create conflict.
One interesting plot idea could be that Jason returns from the dead with a new perspective on Bruce Wayne's methods. He could initially be angry and want to prove Bruce wrong, but as the story progresses, they start to understand each other better. Maybe they team up to take on a new and powerful villain in Gotham that neither could face alone.
A great idea for a Bruce Wayne training fanfic could be his training in stealth. He would practice moving silently through the shadows of Gotham. This could include training in different terrains, like the rooftops or the sewers.
Well, one interesting story could be Bruce Wayne trying to live an ordinary life as a civilian but constantly being drawn into small - scale local problems. Maybe he uses his wits and basic combat skills, not as Batman, but just as a regular guy with a sense of justice.
A fanfic could explore a scenario where Harley Quinn, in her attempts to reform, crosses paths with Bruce Wayne. He initially distrusts her, but as they interact more, they start to understand each other on a deeper level. For example, Harley could be helping at a local shelter that Wayne also supports, and they gradually build a connection.
Another fanfic could be set in an alternate universe where Gotham and New York City are in some sort of alliance. Bruce Wayne and Tony Stark are forced to work together to fight a common enemy that is using both cities' resources for evil. Their different fighting styles and personalities clash at first, but over time they develop a deep respect for each other and become friends.
One interesting plotline could be the kids getting involved in a mystery that Bruce Wayne is trying to solve. They use their own unique skills, like Damian's combat skills or Tim's detective skills, to help their father.
The relationship between them. Their dynamic as mentor - mentee and father - son like bond can be explored in many ways. Fanfics that show how Bruce's dark past influences his way of training Dick, and how Dick brings a sense of lightness to Bruce's life are always interesting.
One interesting Bruce Wayne fanfiction could be about his early days of training before becoming Batman. It might explore how he mastered different fighting styles and detective skills. Another could be a story where Bruce Wayne has to face a new, unknown villain in Gotham while also dealing with his personal life and the secrets he has to keep. There are also fanfictions that focus on alternate universes, like one where Bruce Wayne is a detective in a world without superpowers.