Well, one interesting concept could be the use of magic in scientific experiments. For example, wizards might use spells to control variables in a potion - making experiment more precisely than Muggle science allows. Another could be the study of magical creatures from a scientific perspective, like how a hippogriff's flight mechanics could be related to physics in the wizarding world.
Some fanfictions in this genre might focus on the idea of magical genetics. How is magic passed down through wizarding families? Is there a genetic code for different types of magic? For instance, does the Weasley family's red hair have some sort of connection to their brand of magic? And how could this be studied in a wizarding science context? This exploration of the intersection between magic and what we consider scientific concepts in the Muggle world makes for really fascinating reading.
One interesting concept could be the scientific explanation of magic in fanfic. For example, some might explore how spells could be related to energy manipulation at a quantum level. Another could be the study of magical creatures from a biological perspective, like how a hippogriff's flight is possible considering its body structure and mass.
One interesting 'Harry Potter, not a wizard' fanfiction could be where Harry is a normal muggle but still manages to fight against the dark forces in the wizarding world using his unique muggle skills. Maybe he's a tech - savvy guy who uses modern technology to outwit the magic - using villains.
One interesting story could be about a new character who discovers a hidden spell in the wizard101 world that has connections to the Harry Potter universe. For example, a spell that can open a portal between Hogwarts and the wizard101 schools.
One idea could be a crossover where characters from Harry Potter and Wizard 101 team up to fight a new dark force. For example, Harry Potter and his friends could meet up with the wizard from Wizard 101 in a magical realm that is a blend of both universes.
One interesting concept could be exploring more about the Marauders' time at Hogwarts. Fanfiction might expand on their adventures, like pranks they played that were never mentioned in the original book. Another could be different interpretations of Sirius Black's escape and his relationship with Harry during that time.
Some fanfictions in Harry Potter 2 might play with the idea of the basilisk having different powers or weaknesses. It could also explore the idea of a hidden connection between Ginny and the Chamber of Secrets that goes beyond what was in the original story. There might be fanfictions that change the role of certain characters, like making Neville a more central figure in solving the mystery of the Chamber.
Another idea for a fanfiction could be a wizard who is secretly training as a ninja. They keep their ninja training a secret from their friends at Hogwarts because they're afraid of being judged. But as they get better at it, they start using their ninja skills to protect their friends from dark wizards, like being able to quickly disarm an attacker without using a traditional magic spell.
In 'the black wizard harry potter fanfiction', the exploration of themes could be really engaging. It could delve into themes like redemption, the allure of power, or the consequences of being an outcast in the wizarding world. The author might use the black wizard as a vehicle to show how these themes play out in a different context compared to the original Harry Potter series. This can make readers think about the familiar elements of the series in a whole new light.
One interesting idea could be mutant wizards with unique powers beyond the normal magic in the Harry Potter world. For example, a wizard who can control time in a completely different way than Hermione's time - turner. Another could be mutant wizards having physical mutations that also enhance their magical abilities, like wings that allow for faster flying spells.
There are those fanfictions where a mad wizard tries to create his own version of Hogwarts. He thinks the current Hogwarts is too 'goody - two - shoes' and wants to make a place where dark magic is taught freely. This kind of story usually has a lot of battles between the 'good' wizards and this mad wizard and his followers. It's full of action and drama.