Well, it might start with Ben being somehow transported to the Justice League's universe. His Omnitrix would be a great asset. The Flash could be interested in how Ben can quickly transform into different aliens. They could all work together to stop a threat that neither could handle alone, like an alien invasion that targets both Ben's world and the Justice League's Earth.
In a Ben 10 and Justice League crossover fanfiction, there could be epic battles. Ben could use his alien forms to team up with Superman and take on powerful villains. For example, Ben as Four Arms could help Superman in a physical fight against a huge and strong enemy.
A Ben 10 and Justice League crossover fanfiction could explore the different power dynamics. Ben, with his diverse alien abilities, would bring a new element to the Justice League. Batman might be intrigued by Ben's gadgets and his ability to adapt in combat using different alien forms. Aquaman could also benefit from Ben's flying alien forms when it comes to exploring areas above water. There could be a lot of character interactions, like Wonder Woman teaching Ben some combat skills from her Amazonian training while Ben shows her some of his more unique alien powers.
One possible scenario in 'Ben 10 meets the Justice League fanfiction' is that a new villain emerges who has the power to nullify the powers of the Justice League members. Ben 10, with his Omnitrix, which has a vast array of alien powers, becomes the key to defeating this villain. His alien forms like Heatblast could provide the necessary firepower against the villain's cold - based defenses, while Four Arms could take on the villain in hand - to - hand combat if needed. The fanfiction could explore how they combine their strategies and powers to emerge victorious.
One possible plot could be that the Omnitrix malfunctions and sends Ben 10 to the Justice League's universe. The Justice League initially views Ben as a threat due to his alien forms. But as they learn more about him and the threat of an inter - dimensional villain, they team up. Ben's different alien forms offer unique skills that complement the League's powers, and together they fight the villain to save both universes.
In a Deadpool - Justice League crossover fanfiction, Deadpool might introduce his own brand of chaos to the League. His unorthodox fighting style would contrast with the more traditional superhero methods of the Justice League members. He could start flirting with Wonder Woman, much to the annoyance of Superman. And his regenerative abilities would be a real asset or a nuisance, depending on how the story unfolds. Maybe he'd get into a bet with Flash about who can run faster, with some really out - there stakes.
Well, Ichigo could potentially join forces with Superman. Ichigo's sword skills and high - speed movement could complement Superman's super strength and flight. They could fight against a common enemy like Darkseid. Imagine Ichigo's Getsuga Tensho combined with Superman's heat vision.
The Highbreed could also serve as the main villain. They are a powerful and xenophobic race in the Ben 10 universe. In a crossover, they might view the Justice League's world as a place to expand their territory. They could use their advanced technology and large numbers to attack. Ben would have to convince the Justice League that the Highbreed are a serious threat and together they would need to find a way to stop the Highbreed's invasion, perhaps by using Ben's alien forms like Upgrade to hack into their technology and the Justice League's strategic planning.
One possibility in this fanfiction is the cultural clash. The Avengers are more of an American - based team, while the Justice League has a more global feel. This could lead to some interesting interactions. Hulk might get frustrated with Aquaman at first because he doesn't understand the underwater world. But as they learn about each other, they could form an unexpected bond. Also, the magic users like Doctor Strange and Zatanna could exchange knowledge, creating new spells or ways to fight off enemies.
Well, Ghost Rider's hellish powers would likely shock the Justice League at first. His chain could be a unique weapon against some of the League's foes. For instance, if they were facing a powerful telekinetic villain, Ghost Rider could use his chain to disrupt the villain's powers. Also, his ability to sense sin could lead to some interesting interactions. He might be able to detect hidden secrets among the League members or their enemies.
In such a crossover, Danny could team up with Superman. Danny's ghost powers would be really interesting combined with Superman's super strength. Maybe they'd fight a common enemy that has powers related to both the supernatural and advanced technology.
The crossover would likely involve a lot of cultural clashes too. Naruto comes from a world of ninjas and feudal - like structures, while the Justice League is from a more modern, superhero - dominated world. This could lead to some comical moments, like Naruto trying to figure out how to use a cell phone or the JL members being confused by Naruto's headband. But when it comes to the Juubi, they'd have to put aside their differences. The Juubi's power might be so great that it could potentially destroy both universes. So Naruto and the Justice League would need to combine their powers, with Naruto using his chakra - based attacks and the JL members using their superpowers like Superman's heat vision, Green Lantern's constructs, etc., to take on this ultimate threat.
In a Justice League Avengers crossover fanfic, there could be epic battles. For example, Superman and Thor might have a showdown to test their super strength. They could exchange powerful blows while the other heroes watch in awe.