What could be an interesting plot for a Naruto Hellsing crossover fanfiction?

The plot could be that Naruto is somehow transported to the Hellsing universe. He starts off as an outsider but quickly proves his worth. His rasengan could be adapted to be effective against vampires, perhaps by infusing it with holy water or some other vampire - weakening element. Naruto's presence could also introduce a new dynamic to the relationships within the Hellsing organization, and he might even form an unexpected bond with Seras Victoria as they both have a strong sense of loyalty and a desire to protect the innocent.

One possible plot is that there is a breach between the Naruto universe and the Hellsing universe. This causes chaos as demons from Hellsing start to invade Konoha. Naruto, being the hero, tries to figure out how to stop them. Alucard arrives, not entirely as an ally at first. But as they both realize the common threat, they join forces. Naruto learns about the different nature of the enemies from Alucard and adapts his ninja skills accordingly.

One idea could be a battle between the forces of Hellsing and some unique threat from the Alexandee universe. Maybe the Hellsing crew has to deal with a powerful magic user from Alexandee who is causing chaos in their world.

One possible plot could be that Naruto has to go on a special mission with Kurenai. They might be sent to a hidden village where they discover a new type of jutsu that is being misused. Kurenai's genjutsu skills and Naruto's rasengan could be combined in unique ways to fight against the villains using this jutsu.

One possible plot could be that Riddick somehow gets transported to the Naruto universe. He could initially be seen as a threat, but then he teams up with Naruto and the others to fight a common enemy, like a new powerful Akatsuki member who has powers similar to some of the creatures in Riddick's world. Riddick's combat skills and his ability to see in the dark could give the Naruto gang an edge in battles.

One interesting plot could be that Naruto and The Flash team up to stop a villain who can manipulate time. The Flash uses his speed to move between different time periods while Naruto uses his shadow clones to gather information across a large area. They would have to learn to combine their powers and trust each other's instincts in order to succeed.

Well, perhaps in this crossover, Sephiroth is a rogue ninja from a far - off land that has powers similar to his in the Final Fantasy world. He starts causing destruction in the Hidden Leaf Village. Naruto, being the hero, decides to face him. Along the way, they discover that their powers have some strange similarities. For example, Sephiroth's sword techniques could be compared to some of the advanced sword - using ninja in the Naruto world. And they might end up having to team up against a greater evil that emerges because of Sephiroth's arrival.

One possible plot could be that Lucifer, bored with the underworld, decides to visit the Naruto universe. He could take on the form of a powerful ninja and start causing chaos, which draws the attention of Naruto and his friends. Naruto, seeing the evil in Lucifer's actions, tries to convince him to change his ways, leading to a series of battles and philosophical debates.

A cool plot could be that there is a prophecy in both the Naruto and Percy Jackson worlds. It predicts the coming together of a shinobi and a demigod to save both realms from a powerful, interdimensional evil. Percy arrives in the Naruto world, and he and Naruto have to learn each other's skills. Percy teaches Naruto about Greek mythology and how to fight mythical creatures, while Naruto shows Percy the ways of chakra and ninjutsu. They then journey to different parts of the Naruto world, gathering allies and knowledge to face the impending doom.

One possible plot could be that Naruto, while on a strange mission, gets transported to the Witcher's world. He teams up with Geralt to hunt a powerful demon that has the ability to control minds. Naruto's unique ninja skills, like his shadow clones, would be very useful in distracting the demon while Geralt figures out its weakness.