Perhaps a story where a character from the Naruto universe, who has a connection to Amaterasu, travels to the Young Justice world. There, they meet a character who has a similar power but in a different form. They exchange knowledge about their powers and together develop a new technique that combines the elements of both their abilities. This new power could then be used to save both worlds from a common threat.
A possible fanfiction could focus on Wonder Girl's relationship with other members of Young Justice. For example, she might have a friendly rivalry with Superboy that turns into a strong bond as they face challenges together. This could include them training together and learning from each other's strengths and weaknesses.
One possible fanfiction could be about a character with the powers of Phenex in the Naruto universe. They might use their unique abilities in combination with Naruto's own powers, like the Rasengan. When it comes to Amaterasu and Susanoo, perhaps this new character has to face off against an enemy who wields these powerful Uchiha abilities. The story could explore how the Phenex powers interact with the chakra - based abilities in Naruto's world, whether they enhance or conflict with each other.
In a fanfiction scenario, a Young Justice character with fire - based powers could meet a Naruto character who has seen Amaterasu. They would compare their powers. The Naruto character could explain how Amaterasu is more than just fire, it has a spiritual and chakra - based component. The Young Justice character could then try to incorporate some of those concepts into their own power use, leading to a new and stronger form of their fire ability.
One idea could be Naruto being transported to the Young Justice universe during the Invasion arc. He could use his unique jutsu skills like the Rasengan to fight off the invaders. Maybe he teams up with the Young Justice team and teaches them some of his ninja techniques.
A fanfic could focus on the relationship between Batgirl and Nightwing. In Young Justice, they might have a past that is slowly revealed as the story progresses. It could be about how they first met, trained together, and how their feelings for each other developed over time. There could be some tension between their superhero duties and their personal relationship.
One idea could be a crossover where Naruto is somehow transported to the Young Justice universe and teams up with the heroes there, and then they encounter Wonder Woman. Maybe Naruto's unique jutsu skills can be used in a joint mission with the Young Justice team's powers and Wonder Woman's abilities.
One idea could be a crossover where a character from Young Justice gains the Rinnegan somehow. Maybe through a strange experiment gone wrong that links dimensions. They then have to figure out how to control its powers while still being part of their team in Young Justice. It could lead to some interesting power - up moments and new story arcs.
One idea could be that Naruto, as the son of Black Mask, has to struggle with his father's evil reputation while trying to prove himself in the Young Justice world. He might use his ninja skills in unique ways within the context of the Young Justice team's missions.
In this type of fanfiction, magic could play a role in character development. For Naruto, experiencing a different type of power system like magic in the Young Justice world could make him question his own ninja way. He might start to adapt some of the magic concepts into his own fighting style. And for the Young Justice characters, learning about Naruto's 'magic' (chakra) could open their eyes to new ways of thinking about power and how to use it more effectively.
One possible plot idea could be that Naruto discovers the power of Amaterasu and is intrigued by it. He might try to learn more about it, perhaps seeking out the Uchiha clan members or ancient scrolls. This could lead to him facing challenges as not everyone might be willing to share the secrets of Amaterasu with an outsider like him.