What could be an interesting plot in an Avengers and Naruto crossover fanfiction?

Well, perhaps there's a threat that can only be defeated by combining the chakra in the Naruto world with the superpowers of the Avengers. For example, Thor's lightning could combine with Sasuke's lightning - based attacks. And Captain America's leadership could inspire Naruto to lead his own team in a new way. They all start off not trusting each other much, but as they face challenges together, they learn to work as one.

One possible plot could be that the Avengers are somehow transported to the Naruto universe. They team up with Naruto and his friends to fight a common enemy like Kaguya who has somehow obtained the Infinity Stones. The Avengers' powers and technology would be a huge shock to the Naruto world, and they'd have to learn to combine their skills to succeed.

One possible plot could be that Naruto is somehow transported to the Marvel universe. The Avengers initially mistake him for a threat. But Naruto, being Naruto, tries to explain his situation. He then shows them his ninja skills like shadow clones and Rasengan. Together, they could face a common enemy like Thanos, who has acquired some sort of ninja - like powers. Naruto's ability to never give up and his strong will could inspire the Avengers, and his combat skills could be a great addition to their team in the fight.

Well, a great plot could be that the Infinity Stones start to mess with the fabric of reality and it creates a portal between the Naruto universe and the Marvel universe. The Avengers and Naruto's friends end up in each other's worlds. Naruto and the Avengers have to work together to fix the portals and return everyone to their proper universes. Along the way, Naruto might have some epic battles with villains like Loki, using his ninja speed and strength. And the Avengers could learn a thing or two about chakra from Naruto and his friends.

Well, perhaps the Infinity Stones somehow end up in the world of The Incredibles. This attracts the attention of both the Avengers and the Parr family. The two groups initially have some misunderstandings as they try to claim the Stones. But then they realize that a powerful new villain, created by the combined energy of the Stones, is emerging. So, they join forces. Dash's super - speed could be useful for quickly transporting the Stones, while Thor's lightning powers could help in battles against the villain's minions.

One possible plot could be that Oliver Queen gets transported to the Avengers' universe. He teams up with Hawkeye, sharing their archery skills and combat tactics. They could go on a mission to stop a new threat that combines the technology of the Arrowverse and the super - powered enemies of the Avengers.

One idea could be that Robin, with his detective skills, is investigating a mystery that has ties to the Avengers' world. Maybe it's a series of high - tech thefts that seem to be related to some new villain who has both Gotham - style cunning and super - power ambitions. Robin could team up with Iron Man to analyze the technology used in the thefts. Iron Man would be impressed by Robin's quick thinking and resourcefulness despite not having superpowers.

A possible plot could be that the Avengers are on a mission to retrieve a powerful artifact. Deadpool, who has his own reasons for wanting the artifact, also shows up at the same place. Instead of fighting each other, they form a temporary alliance. Deadpool's knowledge of the underworld and his unpredictable fighting style, combined with the Avengers' superpowers, help them overcome the various traps and enemies guarding the artifact. However, after getting the artifact, they have to decide what to do with it, which leads to some internal conflict among the group and more hilarity with Deadpool's input.

A great plot in this crossover fanfiction might be that an ancient threat from both universes resurfaces. In the HTTYD world, it could be an even more powerful and evil version of the Red Death. In the Avengers' universe, it could be a new group of super - villains. The Avengers and the HTTYD characters then have to combine their skills. The dragons could be used to transport the Avengers quickly across the HTTYD landscapes, and the Avengers could teach the Vikings about modern combat strategies.

Well, perhaps a plot where the AllSpark from Transformers ends up on Earth and its energy attracts both the Transformers and the Avengers. The Avengers are initially suspicious of the Transformers. But as they learn about the Decepticons' plan to use the AllSpark for evil, they join forces. The Hulk could even have some interesting interactions with the larger Transformers like Grimlock.