This revelation would likely shatter Harry's previous idealized view of his father. He might start to question all the stories he had been told. For example, if he was told his father was a hero, now he has to grapple with the fact that he was a bully. It could make Harry feel conflicted, angry, or even a bit lost. He may wonder if he has any of those bullying tendencies in him too.
His friends might be shocked too. They could be supportive of Harry, trying to help him come to terms with this new information. For example, Hermione would probably start researching if there was any way to change this in the magical world's past, while Ron would be more about just being there for Harry, sharing his feelings.
In a fanfic, the family aspect could also include other characters. Maybe Bruce has a new family member that Terry has to protect, or there are family secrets that they both uncover. This could lead to a lot of drama and action. It could also show how Terry's own family views his role as Batman and how that affects his relationships at home.
If Harry finds out Severus is his father in fan fiction, it could completely change the dynamic between them. Harry's view of Severus would shift from hatred or suspicion to a complex mix of emotions. He might start to understand Severus' actions in a new light, like his seeming animosity towards Harry in the original story could be reinterpreted as a father's tough love. This revelation could also change Harry's relationship with the other characters. For example, his connection to the Snape family, if there are any in the fan - made lore, would become significant. It could also impact how he views his mother, Lily, and her relationship with Severus.
One interesting plot could be Harry's struggle to accept Severus as his father. He has such a long - held image of Severus as an enemy, and now he has to come to terms with this new reality. Another plot could be Severus trying to make up for lost time and be a good father to Harry. There might also be a plot where the wizarding world reacts to this news. Some might be shocked, others might not believe it at all.
One interesting plot development could be how Harry's relationship with the wizarding world changes. Knowing Sirius is his father might make him feel more confident and entitled to certain things. He might demand more answers from Dumbledore about his family's past and the secrets that were kept from him. Another aspect could be his relationship with the Weasleys. It might become a bit strained as he realizes his true lineage and starts to see himself in a different light, perhaps more of a pure - blood heir in his own mind, which could contrast with the Weasleys' more humble status.
Harry's character grows in terms of self - confidence. Knowing that Sirius is his father gives him a stronger sense of identity. He no longer feels like an orphan in the truest sense. He becomes more assertive in the wizarding world, demanding respect and answers. For example, he might be more forceful in his interactions with Snape, not tolerating any slights as he now has a powerful family connection.
Maybe in the fanfic, there's a threat to the Wayne family fortune. Terry and Bruce have to work together, with the rest of the family, to protect it. This could involve using their wits and skills in different ways, and also show how the family members support each other in tough times.
He may also be proud that his son is interested in his work. He could use this as a chance to encourage the son's own creativity, perhaps by suggesting they write a short story together or discussing different writing techniques. It could be a turning point in their relationship where they share a more creative and intellectual connection.
Maybe it's a mysterious figure from Merlin's past. Perhaps he had an encounter with a powerful magical being, and some kind of spell or pact led to the pregnancy. It could be a long - forgotten event that now resurfaces with this unexpected pregnancy.