One possible plot could be that Harry, who might be from the Harry Potter universe, is suddenly adopted by Batman in a crossover world. Batman could see Harry's potential and take him under his wing. Harry would then be trained in Batman's ways, learning combat and detective skills. He might also use his own magic in a new way to help Batman fight crime in Gotham, like using magic to disarm villains or solve mysteries that normal means can't.
The Joker could be a main antagonist. He would be fascinated by Harry's magic and would try to use it for his own evil purposes or just to cause chaos. He might try to drive a wedge between Harry and Batman by using mind games.
If Harry Potter was adopted by Batman in fanfiction, it would be a wild blend of two very different universes. Batman's Gotham City is a dark and gritty place, full of crime and corruption. Harry, coming from the magical world of Hogwarts, would be in for a shock. However, Batman would likely see the potential in Harry's magic and use it to his advantage. For example, Harry could use magic to help Batman solve cases more quickly or to protect Gotham in ways that normal technology couldn't. At the same time, Harry would be exposed to Batman's no - nonsense approach to fighting evil, which could make him a more formidable wizard in the long run.
His character would become more stoic. Growing up with Batman, he'd be influenced by Batman's serious and determined demeanor. He might be less likely to show his emotions openly like he did at Hogwarts.
In the fanfiction scenario, if Danny Phantom were adopted by Batman, it would be a really interesting mix of two different fictional universes. Danny, with his unique ghostly abilities like intangibility and flight, would bring a new dimension to Batman's crime - fighting in Gotham. Batman, on the other hand, could offer Danny a more stable family environment and a sense of discipline. Danny could also learn a great deal about strategy and stealth from Batman, which would be useful in his battles against ghosts. And perhaps together, they could face threats that neither could handle alone, like some sort of supernatural - crime hybrid villains.
Well, in such a fanfiction, Percy would likely gain access to Batman's high - tech resources. He could use Batman's gadgets in his battles against monsters. Maybe Batman would train him in combat and detective skills, making Percy an even more formidable demigod.
Well, first of all, Nico di Angelo has his own set of powers and a complex backstory from his original world. If adopted by Batman, he would have to adapt to a completely different environment. Batman would probably be strict but also caring. He'd try to understand Nico's powers and how to use them for good in Gotham. Nico, on the other hand, might struggle with the new rules and the lack of the magic - filled world he came from. But over time, they could form a strong bond like a father - son relationship and face all kinds of challenges together, from the Joker's schemes to other mystical threats that might seep into Gotham.
Ron could also be there. He might be a bit jealous at first if Harry's adopted family is wealthier or has more influence in the wizarding world. But later, he would support Harry as always.
One common theme is family. Since Harry is being adopted, the new family dynamics, love, and acceptance are often explored. For example, how he forms bonds with his new family members.
One great fanfiction could be 'The New Beginning' where fem Harry's life takes a magical turn after being adopted by Zatanna. It explores how Harry discovers her new powers and her relationship with Zatanna.