There could be. Fanfiction writers are known for their wild and creative ideas. Since both Naruto and High School DxD are popular series, someone may have written a fanfic where Naruto is presented as a god - like figure within the High School DxD universe. This could add an interesting twist to the story, perhaps bringing in Naruto's unique powers and abilities into the High School DxD world.
There could be an amazing fanfiction where Naruto somehow gets involved with the world of High School DxD and the concept of a Dragon God. Maybe Naruto's powers would be a great addition to the battles and power dynamics in the DxD universe. He could form unique alliances or rivalries with the characters from DxD.
A fanfic of this nature could explore different themes. One theme could be the clash between different power systems, that is, the ninjutsu from Naruto and the magic in High School DxD. The primordial god connection could act as a bridge or a source of conflict. Another theme could be about Naruto's journey of self - discovery in this new and strange world. He might have to adapt to the different social and power structures in High School DxD while also coming to terms with his new role as someone related to a primordial god.
One idea could be that Naruto, with his unique powers, somehow gets transferred to the world of High School DxD. He could be seen as an 'Immortal God' in that universe due to his chakra and abilities. Maybe he teams up with the main characters of DxD to fight against common enemies. For example, his shadow clone jutsu could be used in creative ways during battles in the DxD world.
One idea could be an OC who discovers their God Slayer magic in a dangerous situation at the high school. For example, a sudden attack by a stray devil forces the OC to tap into this unknown power within them to protect their friends. This could lead to a whole new arc in the fanfiction where the OC has to learn to control and master the God Slayer magic while also dealing with the regular high school DxD drama like relationships and rivalries.
A 'Naruto is God' High School DxD fanfiction would be full of interesting crossovers. Naruto's sage mode could have a different interpretation in the High School DxD world. He might use it to sense the auras of different supernatural beings more clearly. His relationship with the female characters in High School DxD could also be an interesting aspect. Maybe some of them would be in awe of his god - like status, while others might challenge him. And his moral code, which is influenced by his experiences in the Naruto world, would likely clash or blend with the values of the High School DxD world. This could lead to many complex and engaging storylines as he tries to navigate this new universe while being a god - like figure.
There's a fanfiction where Issei, as a God, travels back in time to change certain events in his past. This allows him to avoid some of the early hardships he faced in the original story. It also gives a new perspective on his relationships with other characters like Rias and Akeno, as he now has a different understanding of their importance in his life.
One common theme is power. Since the OC is a god, there's often a focus on their extraordinary powers and how they use them in the high school setting of DxD.
Another idea is that Naruto is reborn in the High School DxD world as a half - dragon due to the influence of the Dragon God. He then has to navigate the complex social and power structures of the DxD world while also hiding his true identity at first. As he discovers more about his new powers and the world around him, he gradually becomes a key figure in the battles and politics of the DxD world.
First, you need to define the origin of the God Slayer magic. Is it something passed down through generations, or did the OC obtain it through a special event? For example, it could be a gift from a mysterious being. Then, consider how the magic affects the OC's personality. If it's a powerful and dangerous magic, they might be more cautious or have a sense of responsibility. Also, think about how it interacts with the existing powers in the High School DxD world. Will it make the OC a target? Will they have to hide it?