One idea could be to explore Harry's life during the summers at the Dursleys in a more in - depth way. Maybe he discovers a hidden magic within the Dursley's house that has been suppressing his true power all along.
A really interesting plot could be if Harry was able to travel back in time to the Marauders' era. He could meet his father and his friends, and get to understand more about his family's past. This would give him new insights into his own identity and the prophecy. He might also be able to change some small events in the past that have a big impact on his present life at Hogwarts.
One idea could be that the Head Boy has to deal with a secret society within Hogwarts that is causing chaos. Maybe they are trying to bring back an old dark magic spell. Another could be that the Head Boy discovers a hidden room in Hogwarts that holds the key to an ancient mystery related to the founders of the school. He then has to protect this secret from those who might misuse it.
Another idea is a story where a spell goes wrong during a Defence Against the Dark Arts class. Instead of just a minor mishap, it creates a portal to an alternate dimension where Hogwarts has a completely different layout and the magic there works in strange ways. The students then have to find their way back while dealing with the strange new magical threats in that dimension.
Well, a plot could involve the baby boy being a huge Harry Potter fan in a world where magic is real but not as well - known as in the books. The daddy, who doesn't believe in magic at first, is then drawn into the magical world because of his son. They could go on adventures to find hidden magical places, similar to the places Harry and his friends discover in Hogwarts.
One plot idea could be Harry dealing with the extra responsibilities of being Head Boy during a time of unrest in Hogwarts, like when there are rumors of a new dark threat. He might have to balance his regular studies, his role as a friend to Ron and Hermione, and his new duties. Another could be Harry using his position to reform some of the old, unfair school rules that have been in place for ages.
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.
In your 'my master harry potter fanfiction', you might want to think about making Harry's master a non - human entity. It could be a magical creature, like a phoenix or a centaur, that imparts unique wisdom and magic to Harry. This would be a really cool twist as it would break away from the typical human - wizard master - apprentice relationship in the original series. You could also explore how the magical community reacts to Harry having such an unconventional master, and how it affects his relationships with his friends like Ron and Hermione.
Well, a great plot idea could be that the little boy is actually from a long - lost clan in the Naruto universe. His family was wiped out, but he has a special mark on his body that holds the key to a great power. As he tries to figure out his past, he meets different characters from the Naruto series who either help or hinder him. He could also be a natural at a particular type of ninjutsu that was thought to be extinct, like some form of water - based illusion ninjutsu.
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.
Another plot might involve a time - travel aspect within the fanfiction chains. A character could go back in time to change a small event, like preventing a certain spell from being misused, which then has a ripple effect on the entire wizarding world, creating a whole new set of adventures for Harry and his friends.
Perhaps a revenant of a Death Eater returns, not to cause more harm, but to seek redemption. This Death Eater revenant could be haunted by the atrocities they committed during the war. They might try to secretly help the students of Hogwarts by warning them of dark magic remnants hidden in the Forbidden Forest or old abandoned classrooms.