Common themes include identity. In crossovers, Naruto may question his identity as a ninja when he's in a world like Middle - earth (from Lord of the Rings crossover). He has to figure out how he fits in. Another theme is the search for purpose. If he's in a Ghost in the Shell - type world, he might be searching for what his role is in that high - tech, complex world. And unity is also a theme. When he teams up with characters from a different universe, like in a crossover with the Avengers, they have to learn to work together as a united front against common enemies.
He could also interact with the new generation of ninjas in his own village who might see him as a relic of the past at first. But as they get to know him, they learn valuable lessons from his experiences. He could train them in unique ways that combine his old - school ninja techniques with the new knowledge and abilities that the new generation has developed.
One possible plot could be Naruto, as an old man, crossing over into a different ninja village's future. He could use his vast experience to help them solve a long - standing mystery or conflict. For example, he might discover that an old enemy has left a hidden threat that is now emerging in this new village. His wisdom and still - potent ninja skills would be crucial in dealing with it.
One popular 'old Naruto crossover fanfiction' is 'Naruto in the DC Universe'. It combines the world of Naruto with the superheroes of DC, creating really interesting scenarios where Naruto's ninja skills interact with superpowers. Another is 'Naruto and Bleach: The Crossover', which blends the unique elements of Naruto and Bleach, like Naruto's chakra with Soul Reaper powers. There's also 'Naruto in the World of One Piece', where Naruto finds himself in the Grand Line and has to deal with pirates and Devil Fruits.
A third option could be 'Naruto in the Harry Potter Universe'. Here, Naruto enters Hogwarts and the magic world. His unique ninja techniques are contrasted with magic spells. It's really cool to see how Naruto deals with things like the Sorting Hat and the different houses, while also trying to keep his ninja identity a secret.
A Naruto and Albedo fanfiction crossover could be really interesting. It could start with Naruto somehow ending up in the world where Albedo exists. Maybe he gets there through a strange jutsu gone wrong. Naruto's positive and determined personality could contrast with Albedo's more complex nature. They could team up to face a common enemy, with Naruto's combat skills and Albedo's knowledge of her world combining to create a unique dynamic.
In a Naruto - Skullgirls fanfiction, Sakura could team up with one of the Skullgirls. Sakura's medical ninjutsu combined with the brute force of a Skullgirl character would make a formidable duo. They could go on adventures together, facing off against common enemies. It would also be fun to see how the two different art styles blend in the fanfiction, like Naruto's more traditional anime look with the unique, somewhat gothic style of Skullgirls.
One possible scenario in a Naruto - Kaneki fanfiction could be that Kaneki somehow ends up in the Naruto world. Maybe through a strange portal or some sort of jutsu gone wrong. He might initially struggle to adapt to the different environment and the presence of chakra. But his own unique kagune abilities could be seen as a strange new form of power in the Naruto universe.
A Naruto and Albedo fanfiction crossover could be really interesting. They are from different fictional universes, Naruto from the ninja - filled world of Hidden Leaf Village and Albedo from the more fantastical world of Genshin Impact. In this fanfiction, perhaps they could meet through some sort of interdimensional rift. Naruto's skills as a ninja, like his shadow clone jutsu, could be a source of amazement for Albedo, who is more into alchemy and magic in his own world. They could team up to face a common enemy that somehow threatens both of their worlds, learning from each other's unique abilities along the way.
One possible fanfiction could be about Naruto and Kuroka teaming up on a mission. Maybe they are in a world where different anime universes collide. Naruto's skills in combat and his never - give - up attitude could be combined with Kuroka's unique powers to defeat a common enemy.