The plot could involve a threat that requires the combined efforts of both universes. Maybe an ancient evil that can only be defeated by the unique powers of Naruto characters and the technology and superpowers of Marvel heroes. For instance, a villain who can absorb all forms of energy is threatening both the ninja world and the Marvel universe. Naruto and his friends team up with the Avengers to stop this threat. Along the way, they have to learn to work together, which could lead to some interesting character interactions, like Naruto trying to understand Stark's high - tech gadgets or Thor explaining his Asgardian magic to the ninja.
A possible plot could be that a portal opens up between the two worlds and some of the Naruto characters accidentally end up in the Marvel universe. They are initially seen as threats, but then they prove their worth when they help the Marvel heroes fight against a common enemy, like a powerful alien race that is invading. As they fight side by side, the Naruto characters learn about different concepts like mutant powers and superhero identities, while the Marvel heroes are introduced to the concept of chakra and ninja techniques. This could also lead to some humorous situations, such as Hulk trying to learn how to do a simple ninja hand sign.
Well, perhaps Harley Quinn is kidnapped by a Marvel villain who wants to use her unique skills for his own evil plans. Let's say it's Loki. He brings her to the Marvel universe. Harley, of course, doesn't take kindly to being used. So she escapes and teams up with the Guardians of the Galaxy. They travel across different planets in the Marvel cosmos to stop Loki's master plan. Along the journey, Harley has to adapt to the strange new world of the Guardians, and there are lots of funny exchanges as she tries to understand their ways and they try to understand her.
Imagine if there was a tournament that brought the best fighters from both universes together. Naruto, Sasuke, and the others from the Naruto world, and Kai, Jay, and the rest from Ninjago. They start off competing against each other but then realize there is a greater threat lurking. A group of shadowy figures wants to steal the powers of both ninjas and warriors. So, they must put aside their differences and combine their skills to fight this new enemy.
The plot could involve a common enemy that both Naruto and Beelzebub have to face. For example, a powerful demon that threatens both the ninja world and the world of Beelzebub. Naruto's determination and Beelzebub's unique abilities would combine to take on this threat. They might start off as rivals, not trusting each other at first, but as they face challenges together, they form an alliance. Naruto could show Beelzebub the value of friendship and loyalty, which are important themes in his own world.
The plot could involve Naruto characters in a Disney - like world. For example, Naruto might find himself in the world of 'Frozen' and team up with Elsa to stop an evil jutsu - using snow monster. He could use his Rasengan against the icy threats while Elsa uses her ice powers to assist him. This would be a cool mix of the ninja - like action from Naruto and the magical, fairy - tale setting of Disney.
It could be amazing. Maybe Percy and his demigod friends team up with the Avengers. Percy could use his water powers to help against a fire - based villain like Hela. His sword fighting skills would be useful in close combat with the likes of Loki. The demigods' magic and the superheroes' powers would create really interesting battle scenes.
In this crossover fanfiction, the Marvel heroes could visit the world of 'Phineas and Ferb'. Spider - Man would be swinging around Danville, impressing the local kids. The Phineas and Ferb gang could show the Marvel heroes how they build those huge and elaborate projects in just one day. And there could be a plot where Doctor Doom tries to steal the boys' inventions to take over the world, and the combined forces of 'Phineas and Ferb' and the Marvel heroes have to stop him.
Well, it could be really interesting. Maybe Naruto and his friends somehow end up in the world of Dog Days. Naruto might be confused by the different rules and the animal - like characters. He could use his ninja skills in unique ways there. For example, his shadow clone jutsu could be used to create distractions during battles in Dog Days' world. And his determination to protect his new friends in this strange land could drive the story forward.
Well, it could be about a character from Naruto who has the Rinnegan being transported to the Marvel universe. Maybe they'd use their Rinnegan powers in unique ways against Marvel villains. For example, the ability to absorb and release chakra could be like absorbing and redirecting energy in the Marvel world.
It would be amazing. Picture Goku teaming up with Iron Man. Goku's raw power combined with Iron Man's high - tech gadgets could make for some epic battles against villains like Thanos or Frieza. They could learn from each other's fighting styles too. Goku might be intrigued by Stark's intelligence and technology, while Iron Man could be in awe of Goku's ability to constantly increase his power level.
Well, it could be about Supergirl getting accidentally transported to the Marvel universe. She might team up with Captain Marvel. They could fight a common enemy like Thanos who has somehow gotten his hands on Kryptonian technology. It would be a clash of two very different power sets and universes.