Yes, there are likely fanfictions out there with this concept. There is a large and creative fanfiction community that often explores different family relationships among characters. You can search on popular fanfiction websites like Archive of Our Own or FanFiction.net to find such stories.
Well, he might get into all sorts of magical adventures. Maybe he has to infiltrate a secret society that only James's family was supposed to be part of. He could be using his new identity to solve some mystery related to James's past that has implications for the whole wizarding world.
Yes, in some fanfics, Harry can be depicted as James' older brother. Fanfic writers often like to play around with the family relationships in the Harry Potter universe to create unique storylines.
Sure. There could be many fanfics out there with this premise. It might show how Harry would have grown up in a different family dynamic, having James as his brother. Maybe he would have been more involved in the early Order of the Phoenix activities, or his relationship with Dumbledore could have been shaped differently due to his new family connection.
One common theme is family secrets. Since Harry being James' brother is not part of the original story, there might be secrets about their family that are uncovered. Another theme could be loyalty. They would likely be very loyal to each other in these fanfictions. And also, adventure. They could go on magical adventures together, like exploring hidden parts of Hogwarts or facing new magical creatures.
There could be. Fanfiction writers often come up with unique ideas, and the idea of Harry as James' brother is no exception. If such a fanfiction exists, it might delve into their family history. Maybe they discover something about their parents that changes their relationship. Their bond could be a mix of loyalty, love, and a shared sense of purpose in the wizarding world. It could also explore how their different personalities interact, with Harry perhaps being more reserved and James more outgoing.
One possibility is that he would use his prior knowledge to prevent the tragedies that befell his family. He could also have a different dynamic with Sirius and Remus, as he'd be part of James' inner circle from the start.
An ancient dark magic entity that has a vendetta against the Potter bloodline. It targets Harry and James, and they have to uncover the secrets of their family's past to defeat it. This antagonist could bring in a lot of mystery and exploration of the Potter family history.
Well, he'd probably be more of a legacy student. He might be treated with even more respect or envy from the start. And he could have a different group of friends. Instead of Ron and Hermione, he might be closer to his brother's old gang, like Sirius and Remus, from the very beginning at Hogwarts.
One interesting plot point would be the family secrets that come to light. If Harry is James' younger brother, there could be secrets about their family that were hidden from Harry before. For example, there might be a hidden magical inheritance or a prophecy that involves both of them. Another aspect could be the impact on Harry's friendships. His relationship with Ron and Hermione might change as he now has a different family identity. Also, the way the wizarding world views the Potter family as a whole could be altered. The Potter family might be seen as even more powerful or have different political implications. And finally, the emotional journey of Harry as he discovers more about his brother James and their family history could be a very engaging plot point.