Perhaps a plot where the characters in Harry Potter find a way to travel across different universes within the wizarding world. They could encounter alternate versions of themselves or discover new magical creatures and spells that are unique to those other universes. This would add a whole new level of adventure and mystery to the story.
One interesting plot idea could be a crossover where the 'across the universe' concept brings different magical universes from the Harry Potter world together. For example, the wizarding schools from different countries might interact in unexpected ways.
Another idea is a fanfiction that focuses on the Marauders' time at Hogwarts. We could see more of their pranks, their relationships, and how they dealt with the growing threat of Voldemort. For example, exploring how Sirius and Remus' friendship developed during those years in greater detail. It would also be cool to see more of James Potter's character before he became Harry's father.
One interesting plot could be if Harry was sorted into Slytherin instead of Gryffindor. It would completely change his relationships and how he's perceived. He might have to deal with the prejudices of his own house while also trying to figure out his role in the fight against Voldemort.
One idea could be a universe where Voldemort won the Battle of Hogwarts. The wizarding world would be in complete chaos and oppression. Harry could be in hiding, trying to find a way to fight back against Voldemort's regime. Another plot could be a world where the Sorting Hat makes different decisions for all the characters. For example, Hermione could be in Slytherin, which would completely change her relationships and the way she approaches magic. Or a parallel universe where magic is known to muggles and they co - exist in a very different way than in the original series.
One plot idea could be that Lily's presence changes Harry's upbringing completely. Instead of growing up with the Dursleys, he has a loving home with his mother. Maybe she starts teaching him magic early on, which gives him an edge when he enters Hogwarts. This could also lead to a different dynamic with his friends, as he might be more confident and skilled from the start.
One idea could be a crossover with the Lord of the Rings universe. Harry and his friends could find themselves in Middle - earth, having to deal with Sauron's forces while also using their magic. Another could be a crossover with the Star Wars galaxy, where wizards and witches interact with Jedi and Sith. Maybe they could learn from each other's use of the Force and magic.
One interesting plot idea could be exploring what would happen if Harry had a different upbringing, like being raised by the Malfoys. It would completely change his view of the wizarding world and his relationships. Another idea might be a time - travel fanfic where Harry goes back to the Marauders' era and interacts with his parents and their friends. This could lead to him preventing certain tragedies or changing the future in unexpected ways. And then there's the concept of a fanfic where the roles are reversed, and Voldemort is the one trying to protect the wizarding world from a greater evil, with Harry being the main antagonist.
A great plot for a Potter Manor fanfiction could involve a mystery that surrounds the manor. For instance, strange noises at night lead Harry to uncover a long - forgotten chamber. It could also be about Harry restoring the manor to its former glory, perhaps with the help of Hermione's research on ancient magic used in the construction of such manors.
Perhaps in a fanfiction, Lily Potter's ghost has a special connection to the magic of love that still exists in her ghostly form. She uses this connection to heal the wounds of those who have been affected by the war. For instance, she could help Neville Longbottom overcome his insecurities by showing him visions of his parents and how they fought bravely. This would not only strengthen Neville but also have a positive impact on the overall morale of the students at Hogwarts.
A great plot for 'across the stars' fanfiction could be a survival story. Maybe the characters are stranded on an uncharted planet and have to use their skills and knowledge to survive. They could face dangerous creatures, harsh weather, and limited resources. Or, you could write a story about a forbidden love between characters from different factions in the 'across the stars' world. This would involve a lot of drama as they try to keep their relationship a secret while also dealing with the expectations and rules of their respective groups. Also, a mystery - solving plot where the characters have to figure out who is behind a series of strange events in their universe would be exciting.
One idea could be Harry Potter using his wizard skills in a boxing ring in a unique way. For example, he might use a levitation charm to dodge punches or use a stunning spell on his opponent's gloves to make them heavier. Another could be a story where the wizarding world has its own boxing league and Harry has to compete against other magical beings like werewolves or giants in the ring.