Well, one plot could be that Harry is adopted by a family outside of the wizarding world. He grows up with no knowledge of magic until strange things start to happen around him. Then he discovers his true heritage.
Maybe in the fanfiction, Harry is adopted by a powerful but reclusive wizard family. They teach him magic in a very different way from Hogwarts, and he has to face challenges that come with this new way of learning magic. For example, he might have to master some ancient and forgotten spells that are not taught at Hogwarts.
In some stories of this fanfiction, Harry could be adopted by a family of magical creatures. He forms a deep bond with them and learns their unique magical abilities. This could lead to him having a different perspective on the wizarding world compared to other wizards. He might use his knowledge of the magical creatures to solve problems in the wizarding world that others can't.
Well, perhaps in the 'harry adopted by ar fanfiction', there's a plot where Harry is adopted by a family that has a dark secret. As he grows up with them, he starts to uncover this secret little by little. It could be something related to an ancient magic or a hidden prophecy that his new family is somehow involved in. This would create a lot of mystery and suspense in the story.
One interesting plot could be Harry adjusting to his new family and trying to hide his true identity from muggles while also relearning magic at a younger age. For example, he might accidentally use magic in front of his new adoptive family and have to come up with creative excuses.
Another plot could involve Harry's relationship with the Greengrass sisters. He could form a strong bond with them, especially Daphne or Astoria. They might help him in his studies at Hogwarts in a different way compared to his friends in the original story. And as they grow older, their relationships could evolve into something more complex, like a deep friendship or even a romantic interest.
Some fanfictions might have a plot where the muggle family tries to 'cure' Harry of his magic. They could take him to various doctors or therapists thinking he has some sort of mental disorder. Meanwhile, Harry is feeling more and more isolated and confused. When he does meet someone from the wizarding world, like a Hogwarts teacher who comes to check on him, it's a moment of great relief and the start of a new journey.
One interesting plot could be Harry growing up with Snape's strict but ultimately caring guidance. Snape might teach Harry potions from a very young age, and Harry could develop a different kind of magic skill set compared to canon. Another plot could involve Harry having to deal with the Slytherin side of the wizarding world earlier, as Snape has strong Slytherin ties. Also, the relationship between Harry and Snape could be a complex mix of father - son dynamic and teacher - student relationship, which would be really fascinating to explore.
Maybe the story could revolve around how Harry and Luna protect their baby from dark forces that still lurk in the wizarding world. They would use their unique skills and knowledge to keep the baby safe. For example, Luna's ability to see things others can't might help them detect hidden threats. Harry, with his combat skills, would be ready to fight off any attackers. Their friends like Ron and Hermione could also play important roles in this story, perhaps helping to babysit or providing magical protection for the baby.
Well, perhaps in the fanfiction, Snape discovers Harry has a special magical ability that is both a danger and a great potential. As a 'daddy' figure, he has to guide Harry in controlling it without alerting the wrong people. He might take Harry on secret excursions to practice this ability in safe places.
Well, in this type of fanfiction, a plot could be that Harry is forced to be a baby due to a dark magic experiment gone wrong. As a baby, he may start to show signs of his future heroic self in unexpected ways. For instance, he might be able to communicate with magical creatures that are drawn to his innocent form. Also, Dumbledore could be faced with a new challenge of protecting Harry in this vulnerable state. He might have to place Harry in a different kind of hiding, perhaps with a family that has special abilities to deal with magically altered children.
One interesting plot could be their first encounter as babies and how they seem to have an instant connection, like they recognize something special in each other. Maybe they reach for each other's hands or stare at each other in a really cute way.
One interesting plot could be the main character, who is adopted by God, discovers they have special powers. They then use these powers to help people in a world full of chaos. Another plot might involve the character having to prove themselves worthy of being God's adopted child by facing various trials and temptations.