Well, a really interesting plot could be set in a magical world where James has a special power that Harry doesn't understand at first. Harry then embarks on a journey to figure it out and in the process, they discover a long - lost family secret. It could also be a story about how they deal with the loss of a loved one together. Harry being the more emotional one and James trying to be strong for him. And then they grow closer through this difficult time.
Perhaps Harry gets into a time - travel adventure and meets a younger James. He has to navigate the situation without revealing their future relationship. This could lead to some comical and heart - warming moments as Harry sees a different side of his brother before all the fame and heroics.
Another plot could involve Harry discovering some long - lost family secrets that James was unaware of. This could lead to a whole new adventure as Harry tries to uncover the truth. He might find an old family heirloom that has special powers or a connection to a hidden part of the wizarding world. It could also cause some tension between him and James as James might be a bit jealous or protective of their family's secrets.
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.
One idea could be that Fem Harry shows a great aptitude for magic early on, much like her father James. She might have a special bond with James as he trains her privately. Another could be that she faces unique challenges in Hogwarts due to being female in a story where the original Harry was male, like different social interactions.
One idea could be that Harry, in James' body, has to deal with the Marauders' era challenges like handling Snape's enmity in a different way. He could use his knowledge of the future to prevent some of the bad blood between them. Another plot could be James, in Harry's body, trying to figure out modern Hogwarts and the new threats like Voldemort's return. He might be shocked by how much the wizarding world has changed yet still use his old - fashioned courage to face the new problems.
A possible plot could be that James is being targeted by a new dark wizard who is seeking revenge on the Potter family. Harry and Ginny must then take extreme measures to protect their son. They might enlist the help of the Order of the Phoenix again. Meanwhile, James starts to show great courage in the face of danger, much like his father did when he was young.
A really interesting plot could be that James and Lily, alive, work with Dumbledore to create a new school of magic. This school would focus on teaching students how to defend against the Dark Arts in a more practical and hands - on way. Harry would be one of the first students there. They could also develop new magical artifacts that could help in the fight against evil. And the family could have adventures all over the world to find the ingredients and knowledge needed for these new creations.
One interesting plot idea could be that Lily and James, alive and well, decide to train Harry in magic from a very young age. This would make Harry an even more powerful wizard earlier on. They could also use their influence to reform the wizarding world, starting with Hogwarts. For example, they might introduce new courses that focus on both light and dark magic, teaching students how to defend against the dark arts in a more comprehensive way.
Well, a plot could involve Harry having to deal with the memories and legacies of both his fathers. He might discover hidden secrets about James and Sirius that were kept from him. Maybe he uncovers a powerful magic that they were working on together before they died. Also, the relationship between Harry and his friends could change. Hermione might be more intrigued by the new historical and magical implications of his parentage, while Ron could be a bit jealous at first but then come to embrace it as part of Harry's identity.
One idea could be exploring how Harry and Ginny prepare for the arrival of their baby. They might be nervous yet excited. Maybe they start redecorating a room in their home at the Burrow. Another plot point could be the reactions of their friends. Hermione would likely be super helpful, giving Ginny advice on pregnancy and child - rearing. Ron, on the other hand, might be a bit clumsy with his congratulations but still be really happy for them.