Maybe Joel and Ellie from The Last of Us find themselves in the Hidden Leaf Village. Joel, with his survival skills, could offer new combat training methods to the ninja. And Ellie might befriend some of the younger ninja and learn about chakra. It would be interesting to see how they adapt to a world full of ninjas and different power systems.
One creative storyline could be that Naruto characters are transported to the post - apocalyptic world of The Last of Us. Naruto, with his indomitable spirit, could start to gather survivors and teach them his ninja skills to better defend against the infected. For example, his shadow clone jutsu could be used for scouting and distracting the clickers.
Another possibility is a crossover where the Cordyceps fungus from The Last of Us infects some of the ninja in Naruto's world. Naruto then has to find a way to stop the spread while also dealing with the social unrest it causes. This could lead to some really intense battles between the infected ninja and the healthy ones, with Naruto trying to find a cure using his own knowledge and the help of his friends.
One possible storyline could be that Naruto, with his unique skills and positive attitude, enrolls in the high school from High School DxD. He might form an unlikely friendship with some of the characters there, like Issei. Together, they could face off against common enemies, with Naruto teaching Issei some of his ninja techniques, adding a new dimension to the battles in the High School DxD universe.
One creative plot could be a crossover where Naruto characters are sent to the Mahouka Koukou world. Naruto's ninja skills might be misinterpreted as some new form of magic in the magic - high school setting. For example, Sasuke's Sharingan could be seen as a powerful and mysterious magical ability. Another plot could involve the exchange of knowledge between the two worlds. Maybe the characters from Mahouka Koukou teach the Naruto characters about advanced technology and magic theory, while Naruto characters show them unique ninja combat and chakra control techniques.
One creative crossover could be the use of Naruto's jutsu in the Middle - earth setting. For example, Naruto's shadow clone jutsu could be used in a battle against orcs. The clones could confuse the enemy, just like in his own world. Another aspect could be the sharing of values. The hobbits' loyalty and friendship is similar to the bonds Naruto forms with his comrades. Maybe Naruto could learn from the hobbits' simple way of life and find a new perspective on his ninja world.
One creative storyline could be that Naruto and Megaman team up to fight a new enemy that has the ability to steal both ninjutsu and robot powers. They would have to combine their unique skills to defeat this powerful foe.
One idea could be a crossover where the magic from Harry Potter is used to combat the infected in The Last of Us world. For example, the Patronus charm could be used to repel the Clickers as it is a powerful form of positive magic. Another could be that some of the characters from The Last of Us are transported to the Hogwarts world and have to learn magic to survive in this new and strange place. They could be sorted into houses based on their personalities.
Well, there could be a story where the Nine - Tailed Fox's power gets unleashed in the Mount and Blade world. This would cause chaos among the kingdoms and factions. The Mount and Blade characters would have to figure out how to deal with this powerful and unknown force. At the same time, Naruto would be in a struggle to control the Nine - Tails' power in this new and unfamiliar setting.
A Danny Phantom and The Last of Us fanfiction might focus on the characters from both universes interacting. Joel and Ellie could meet Danny and his friends. Danny could use his powers to protect them from the various threats in The Last of Us world, like clickers. It could also explore how the different rules of the Danny Phantom world, such as the existence of the Ghost Zone, would impact the already complex world of The Last of Us.
In some fanfiction, Godzilla could be a guardian of a hidden magical realm within the Harry Potter universe. This realm contains powerful magic that could be used for good or evil. Voldemort tries to gain access to this realm to get more power, but Godzilla stands in his way. Harry and his friends then have to decide whether to help Godzilla protect the realm or try to find a way to use the power within for their own fight against Voldemort.
One idea could be a crossover where Naruto characters are able to bend elements like in Avatar. For example, Naruto discovers he has the ability to airbend. This could lead to a whole new adventure as he tries to master this new skill while also dealing with his ninja duties in the Hidden Leaf Village.
One creative crossover could be the wizards from Harry Potter using their magic to help the Demon Slayer Corps in some way. For example, they could use spells to detect demons more easily or to create barriers to protect the villages. Another idea is having the Demon Slayers learn some basic magic from the wizards. This would give them an edge in their fight against demons. Maybe a character like Tanjiro could learn a spell to heal faster, which would be very useful in his battles.