Bruce's life as Batman would change drastically. He would now have someone depending on him not just as Bruce Wayne but also as Batman. He might have to cut down on his nightly patrols or find more secure ways to keep the baby safe while he's out fighting crime. He would also be more motivated to make Gotham a safer place for his baby to grow up in, so he could focus on taking down the major threats to the city more quickly.
As Batman, he would need to be more discreet. The presence of a baby means that his enemies could potentially use the baby against him. He would probably start to develop new gadgets and strategies to keep the baby safe even when he's not around. Also, he might start to work more with the police and other heroes to ensure that Gotham is safe enough for the baby, which is a big change from his usually solitary approach.
The dynamic could be complex. Thomas might be both proud and worried seeing Bruce as Batman. Proud that his son is carrying on the legacy, but worried about the dangers. He could be overprotective at first.
Their relationship could become deeper and more complex. They now have a shared responsibility in raising the baby. Bruce might rely on Selina's more fluid approach to life when it comes to parenting, and Selina might come to appreciate Bruce's sense of order more. There could also be some arguments about how to raise the child, for example, Bruce might want a more strict upbringing while Selina wants the baby to be more free - spirited.
One reason could be that Bruce Wayne never had the traumatic event that led him to become Batman in the original story. Maybe his parents' death was prevented somehow, so he never felt the need for vengeance and justice in that extreme way.
Well, Bruce Wayne's been Batman for a really long time in the comics. It varies depending on different storylines and continuities, but it's been a significant part of comic book history.
The author might introduce a new character to take on the role. Maybe a completely unknown vigilante steps up. This new character could have different motives and methods compared to Batman. For example, they could be more focused on preventing crime through community outreach rather than the intimidation tactics Batman uses.
Well, in such a fanfic, it might show Bruce Wayne as a completely different entity from Batman. Maybe Bruce is just a normal rich guy who has no idea about the vigilante activities of Batman. He could be living his own life, focused on business and social events, while Batman is someone else entirely, perhaps an unknown figure with no connection to the Wayne family.
In some fanfictions, Bruce Wayne becomes Batman after witnessing the brutal murder of his parents. This tragic event plants the seed of vengeance and justice in him. He then spends years traveling the world, learning various combat skills and detective techniques from different masters. He returns to Gotham with a newfound determination to clean up the crime - ridden city.
Bruce Wayne's presence would likely bring a sense of discipline and high standards. His skills and knowledge are far beyond the average cadet, so he could inspire others to strive for more. For example, in physical training, he'd set new records and make others work harder. Also, his moral compass would influence the academy's culture, making it more about true justice rather than just following orders.
Their relationship would likely become more protective. Bruce, being Bruce Wayne, would be extremely protective of Selina and the unborn child. He might be even more vigilant in Gotham to make sure they are safe.
In this fanfiction scenario, Poison Ivy may initially be angry. She might feel betrayed if she had some sort of relationship with either Bruce Wayne or Batman before. She could also be a bit jealous, thinking that Batman has been hiding this huge part of himself from her. However, on the other hand, she could also be impressed by the lengths Bruce goes to protect the city. This new knowledge could lead to a whole new dynamic between her and Batman, with her either becoming an ally or an even more dangerous foe, depending on her motives and the events that unfold in the fanfiction.