Well, perhaps Harry is adopted by a family of magical creatures, like centaurs. They teach him their unique ways of magic and understanding of the magical world. He could have a whole different perspective on things like divination, as centaurs are known for their prophetic abilities. It would be really interesting to see how he interacts with his human friends at Hogwarts after growing up in such a different environment.
Another plot idea could be a family that adopts a magical creature as a part of their family. In the wizarding world, this is quite unusual. The family then has to deal with the reactions of the wizarding community. They also have to learn how to take care of the creature, and the creature could end up helping the family in unexpected ways during their adventures in the Harry Potter - like world.
One idea could be exploring Harry's family vacations. Maybe they go to a magical beach where the kids learn special water - based magic. Another could be a story about Harry teaching his kids about the Marauder's Map and the adventures they have trying to find hidden passages in Hogwarts that even he didn't know about.
Another plot could involve a member of the royal family in the Muggle world being a Squib. This person, desperate to be part of the magical world, tries to find a way to regain their magic through the help of the Potter family. The story could then revolve around the secrecy that needs to be maintained while also trying to help this person, and how it affects the relationship between the wizarding and Muggle royal families.
You could also focus on the Weasley - Potter family relations in a fanfic. For instance, how the two families' magic combined in different ways. Maybe there are some spells that only work when a Potter and a Weasley work together, and exploring those spells and the situations where they are used can make for a great fanfic story.
Another plot could be that the OC is an outcast in the wizarding world due to their unorthodox magical abilities. They see Harry as a kindred spirit. When they adopt him, they take him on a journey to discover the true nature of magic, which is different from what is taught at Hogwarts. This could involve exploring hidden magical realms and learning from magical creatures that are not well - known in the wizarding community.
A possible plot in this female Harry Potter adopted fanfiction could be that she's adopted by a foreign wizarding family. They introduce her to different magical cultures and traditions. For example, she could learn about Asian magic, with its focus on balance and harmony. This would make her a more well - rounded witch. Her adopted family might also have a secret grudge against Voldemort, which adds another layer to the story. As she grows up, she uses her combined knowledge of different magics to fight against the dark forces in the wizarding world, all while dealing with the fact that she's not like other wizards due to her adoption.
Another idea is that Harry travels to a time when his family was being hunted by Voldemort but in a parallel timeline. He could try to find a way to merge the timelines in a way that saves his family in both timelines. This would involve a lot of complex magic and decision - making on Harry's part.
In the 'Harry Potter adopted son of vixen fanfiction', it's possible that the vixen is part of a long - forgotten magical race. Harry, as her adopted son, might be caught in the middle of a power struggle between this race and the traditional wizarding world. He could be the key to bringing peace or might have to fight to protect both his new family and his friends at Hogwarts. His vixen - influenced nature might make him more attuned to nature - based magics, which could set him apart from other wizards.
Perhaps Harry is adopted by a Muggle family who are aware of the wizarding world. They could be a family of scientists who study magic from a scientific perspective. Harry would grow up with a unique understanding of magic, seeing it both as a wonder of the wizarding world and something that can be analyzed. This might make his time at Hogwarts very interesting as he tries to blend these two views of magic.
In this fanfic, the plot could center around Harry's identity crisis. He's adopted by wolves, so he has this wild, untamed side, but he also has his wizarding roots. He might struggle to fit in when he finally enters the wizarding world. The wolves could have taught him a different moral code, and he has to reconcile that with the rules and values of Hogwarts. This internal conflict could drive the story forward, with him making new friends who either accept or reject his wolf - like qualities.