Another plotline could be that Harry is adopted by a family of dark wizards who initially want to use his fame and power for their own dark purposes. But as they get to know Harry, they are gradually changed by his goodness and end up turning away from the dark arts. This would be a great exploration of the power of redemption and the influence of one's environment.
One interesting plotline could be that Harry is adopted by a powerful wizarding family outside of Britain. They might introduce him to different magical cultures and spells, expanding his magical knowledge far beyond what he would have learned at Hogwarts. This could lead to him having unique magical abilities and a new perspective on the wizarding world.
One interesting plotline could be how Harry adjusts to the Malfoy family's pure - blood traditions while still holding onto his own values. For example, he might struggle with the Malfoys' views on Muggle - borns. Another could be his relationship with Draco Malfoy. Instead of being rivals, they could become brothers in a sense, and their dynamic would change completely, leading to new adventures at Hogwarts together.
One interesting plotline could be that Harry is adopted by a powerful wizard family outside of the wizarding world. They introduce him to different magical cultures and techniques that are not common in Hogwarts. This gives Harry a whole new perspective on magic and makes him even more powerful in the long run.
One interesting plotline could be a character who is adopted into a pure - blood family and has to navigate the complex politics of the wizarding world's blood hierarchy. They might face discrimination from some traditional pure - bloods while also trying to find their place within the family's expectations.
Another possible plotline is the relationship between Harry and the goblin community. How do they accept him as one of their own? There could be some goblins who are against the idea of adopting a human, and Harry has to prove himself worthy. This could lead to a lot of internal conflict within the goblin society as well as Harry's own personal growth.
One possible plotline could be that Harry's adopted Veela family helps him discover new magical abilities that are unique to their Veela heritage. This could give him an edge in his battles against Voldemort.
In this 'harry is blood adopted by potter fanfiction', a great plotline could be Harry's struggle to find his identity. He's now part of the Potter family in a more profound way, but he also has his own experiences and personality. There could be a story arc where he tries to blend the two, while also dealing with the fact that his adoption might have been part of some greater plan. Maybe he uncovers a conspiracy behind his adoption, which involves dark wizards or hidden agendas within the wizarding world. This would not only change his view of his family but also his role in the fight against evil.
One interesting plotline could be the female Harry Potter adjusting to life in the Malfoy Manor. She might struggle with the pure - blood ideals that the Malfoys hold while also trying to keep her own identity. Another could be her relationship with Draco. Since they are now in a more family - like situation, their dynamic could change from the original enmity in the books. And she might also discover secrets about her parents from Narcissa that were previously unknown.
Perhaps a plotline where Harry's werewolf bite changes the way the wizarding community views him. Some might see him as a threat, while others might see him as a symbol of the intersection between different magical beings. This could lead to a whole new set of challenges and alliances for Harry.
One interesting plotline could be how Sirius helps Harry discover more about his parents in a more personal way. Since Sirius was James Potter's best friend, he could share countless stories and memories that Harry never knew. Another plotline might involve Sirius teaching Harry some advanced magic that he wouldn't learn at Hogwarts. This could give Harry an edge in dealing with the various threats he faces. Also, their relationship could be explored in depth, showing how Sirius becomes not just a guardian but also a true father figure to Harry.
One interesting plotline could be Harry growing up with the Black family's unique traditions and magic. He might learn different spells and magical knowledge that are specific to the Black family heritage. Another could be his relationship with Sirius Black within the family context, perhaps having a closer bond earlier on.