Well, in 'naruto fairy summon fanfiction', there could be the idea of a special bond between the summoner and the fairy. This bond might not just be for combat but also for personal growth. For example, the fairy could teach the summoner about a different kind of chakra or a new way of thinking. Also, the fairies might have their own society within the fanfiction world, with their own rules and hierarchies.
One interesting concept could be the unique and often dark nature of the summoned creatures. In regular Naruto, summons are somewhat standard, but in dark summon fanfictions, they might be more menacing, like demons with special powers that can corrupt the summoner or the environment around them.
One interesting concept could be the combination of Naruto's ninja abilities with the magic system of Fairy Tail. For example, Naruto's shadow clones might be used in a unique way when combined with Fairy Tail magic, like using clones to perform multiple spell - casting simultaneously.
One interesting concept could be the combination of magic from Fairy Tail and ninjutsu from Naruto. For example, how would a Fairy Tail mage use Sharingan abilities? Another could be the character interactions. Imagine Naruto meeting Natsu and them getting into a friendly competition about who is stronger. It could also be about the different worlds colliding, like how the Hidden Leaf Village would interact with the Fairy Tail guild and its various locations.
One concept that stands out in such fanfiction is the evolution of bloodline abilities. In Naruto, bloodlines like the Byakugan have their own set of powers. When combined with Fairy Tail's idea of magic growth, the bloodline abilities in the fanfiction could potentially grow and change in new and unexpected ways. For instance, a character with a Uzumaki bloodline might find that their chakra reserves increase not just through training but also by bonding with a Fairy Tail - like magical entity.
One interesting concept could be the combination of the unique powers from Naruto and Fairy Tail universes. For example, the jutsus from Naruto and the magic in Fairy Tail might be merged in creative ways by the characters in the fanfiction.
One interesting storyline could be a young ninja who discovers a rare and powerful insect summon. For example, they might find a group of glowing beetles that can create illusions. The ninja then has to learn how to control and use these beetles in battles against other powerful foes in the Naruto universe.
Some fanfictions might explore the idea of Naruto befriending an Espada. This friendship could lead to Naruto learning about different ways of combat and power management from the Espada. It could also result in the Espada having a change of heart due to Naruto's positive influence, and together they could face new threats in the Naruto universe that neither could face alone.
In Naruto fanfiction, the Sharingan is often explored in unique ways. For example, some fanfictions might expand on its ability to not only copy jutsu but also to predict an opponent's moves on a whole new level. Another interesting bloodline concept could be the Uzumaki's massive chakra reserves, and fanfictions may play with how this could be used in different scenarios, like creating entirely new jutsu.
In 'naruto dark naruto fanfiction', the concept of Naruto's doppelganger or 'dark Naruto' is often explored. This could be a manifestation of his repressed negative emotions. It might be that this dark Naruto has its own goals that are contrary to the real Naruto's. For instance, it could want to destroy the Hidden Leaf Village instead of protecting it. And the story could revolve around how Naruto deals with this inner darkness, either by trying to suppress it or, in a more extreme version, merging with it and becoming a different kind of hero or anti - hero.
One interesting concept could be an exploration of Naruto's dark side. It might show how his experiences could have turned him truly evil, like if he had been more influenced by the hatred in the ninja world from the start. Maybe in this fanfiction, he uses his powers for self - gain rather than for the good of the village.