A possible crossover is that the ninjas in Naruto start to worship the goddesses from Ah My Goddess. This could lead to a whole new power dynamic where the goddesses have to decide how to interact with these new followers. They could bestow special powers or blessings on the ninjas. Or, the ninjas could try to steal the powers of the goddesses, creating a big conflict.
Well, in a Naruto and Ah My Goddess fanfic, we could see the love interests mix. Maybe Naruto falls in love with one of the goddesses. This would be a very different kind of relationship compared to what he has in his own world. The goddess could introduce him to new ways of living and thinking. And the other characters in Naruto would have to adjust to this new relationship as well. It could also lead to some comical situations as Naruto tries to understand the more refined and different culture of the goddesses.
One common theme is the relationship between the main characters. Since the story has a strong focus on the bond between the human and the goddess, many fanfics explore different aspects of their relationship, like how they overcome challenges together. Another theme is the exploration of the goddess's powers and how they interact with the human world. It can lead to some interesting plotlines where the goddess uses her powers in unexpected ways.
One good example could be a fanfic where the goddesses from 'Ah My Goddess' visit the Naruto world. They might use their powers to help the characters in Naruto deal with a particularly difficult villain. For instance, Belldandy could use her magic to heal the injured ninja after a big battle.
One interesting crossover could be the characters swapping their powers. For example, Deku having Naruto's chakra and being able to perform jutsus. It would be really cool to see how he would use them in the My Hero Academia world. Another could be the heroes and ninjas teaming up to fight a common enemy. Maybe the League of Villains and some of the Akatsuki members joining forces, and then the heroes and ninjas having to combine their skills to defeat them.
One way to explore different power systems is to have a character from one universe be reborn in the other. For example, if a Naruto character is reborn in the Ah My Goddess universe, they would have to adapt to using the goddess - like powers. They could bring their ninja knowledge of strategy and combat into this new world, but find that their old power system of chakra is no longer relevant. This would force them to fully understand and master the new power system while also showing the differences between the two.
One common theme is the clash of different mythologies. Since 'ah my goddess' has its own set of divine beings and 'highschool dxd' also has a complex system of devils, angels, and other mythical creatures, fanfics often explore how these different mythologies interact.
In a fanfic, their different origins could play a big part. Naruto, an orphan ostracized by his village at first, and Superman, an alien orphan. They could bond over their shared feelings of being alone at the start. Superman could teach Naruto about his Kryptonian heritage and how to embrace it, while Naruto could show Superman how he overcame the hatred in his village and turned it into love and loyalty.
Well, a great crossover idea in naruto and marvel fanfic is the Avengers team coming to the Naruto world. Imagine Iron Man trying to figure out the chakra system while Captain America is learning ninja techniques. This would bring a whole new dynamic to both universes as they interact and learn from each other.
One interesting crossover could be the combination of Naruto's ninja skills with Bayonetta's witch powers. For example, Naruto could use his shadow clones in a fight while Bayonetta uses her summoned demons. They might team up to face a powerful enemy that threatens both their worlds. Maybe a villain from the Naruto universe that has some connection to the forces of evil in Bayonetta's world.
One interesting crossover could be Naruto characters trying to catch Pokemon. For example, Naruto might see a Pikachu and think it's some kind of strange new summon. He'd probably try to befriend it in his own energetic way. Another could be the Pokemon trainers coming to the Naruto world and being amazed by the ninja abilities. They might try to learn some ninja techniques, like how to walk on water or climb trees easily.
Another interesting aspect is how the two different worlds' values collide. In Naruto, there is a strong emphasis on honor and loyalty among ninja clans. In My Hero Academia, it's more about being a hero for the public. When characters from both universes interact, they have to reconcile these different value systems, which makes for a deep and engaging fanfic.