One interesting concept could be alternative magical abilities for the characters. For example, giving Hermione the ability to control time in a different way than just using the time - turner. It adds a whole new layer to her character and the stories she can be involved in.
Another concept might be a different take on the Hogwarts houses. Maybe in this fanfiction, the sorting hat has different criteria, and characters end up in houses that are unexpected. This can lead to new friendships and rivalries, like a Slytherin Harry who has to navigate his way through the house's reputation while still being the hero.
One interesting concept could be alternate character developments. For example, a fanfic might explore what would happen if Naruto had a different approach to his training from the start. Another concept could be unique jutsu combinations that are not in the original series. Also, exploring different relationships between characters in new scenarios is quite common, like how Naruto and Sasuke's friendship could have evolved in a more complex way due to different plot twists in the fanfiction.
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 aspect could be the exploration of underutilized Naruto powers in a new light through the gambit powers concept. Maybe a character discovers a hidden aspect of the Sharingan or Byakugan that is enhanced by a gambit power. It could be something like the ability to see through time briefly during a critical gambit move, adding a whole new layer to the power's potential.
One interesting concept could be alternate timelines. For example, what if Harry had been sorted into Slytherin instead of Gryffindor? It would completely change his relationships and the way the story unfolds. Another concept might be new magical creatures that are introduced in the fanfiction. These could add more depth to the wizarding world we already know.
One interesting concept could be a Kryptonian attending Hogwarts. Imagine a character with super strength, heat vision, etc., trying to fit in and learn magic at the same time. They might use their Kryptonian abilities in unique ways during Quidditch matches or in battles against dark wizards.
Well, sometimes the veil in fanfiction is used as a way to bring back dead characters. Imagine if a character found a way to communicate with those on the other side of the veil and managed to pull someone back. This could create really complex and emotional storylines, especially if there are consequences for messing with the natural order of life and death.
One interesting concept could be a saber duel between Harry Potter and a powerful dark wizard. The use of sabers in the magical world of Harry Potter can add a new and exciting dynamic to battles.
Another cool transformation idea is the transformation of inanimate objects into living things. Like a broomstick that transforms into a magical creature. This would completely change the dynamics in a story. It could be used for comical effect if the broomstick - now a creature - has a sassy personality and causes chaos in Hogwarts. Or it could be a serious plot point if it was part of a dark magic experiment gone wrong.
In the 'harry potter with wings fanfiction', an interesting concept might be the magical properties related to the wings. Maybe the wings are not just for flying, but they can also be used to cast certain spells or protect the wearer from dark magic. For instance, the feathers of the wings could be used in potions to give the drinker temporary flight abilities or enhanced magical powers.