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.
It could be Ben himself. His ability to transform into various aliens gives him a unique edge. He can adapt to different situations quickly, which would be fascinating to see when interacting with the Justice League.
In such a fanfiction, there might be a big threat that requires both teams to combine their skills. The Flash could race with Kid Flash and share some speed - related tips. And Wonder Woman could train the female members of Young Justice in combat.
The Phantom Troupe could form an uneasy alliance with some of the more morally grey members of the Justice League, like Catwoman or Lobo. They might team up to take down a common enemy that the League can't deal with using their usual methods because of legal or moral constraints.
Brucie in this fanfiction could be someone who has been living on the fringes of society. He might be a street - smart person who has a deep understanding of the underbelly of the city. When the Justice League meets him, they realize that his knowledge can be useful in their fight against crime. He could also be a bit of an outcast, which makes his relationship with the super - heroes all the more interesting.
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.
Another interesting plot could be that a powerful villain creates a device that can steal powers. He targets both Ben's aliens and the Justice League members. Ben and the League have to find a way to stop the villain before they lose all their powers. They go on a wild adventure across different dimensions to find the parts needed to destroy the power - stealing device.
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.
Well, in such a fanfiction, there could be a lot of interesting scenarios. Maybe Batman would have to deal with the different leadership styles of the Justice League while trying to keep his family in line. The Batfamily members could show off their unique skills to the League members, like Robin's acrobatics or Batgirl's hacking skills.
In this fanfiction, Ladybug might show off her unique powers to the Justice League members. For example, her yoyo could be a source of great fascination as it has various functions like swinging around and also being a weapon. Maybe she'll team up with Superman to fight a common enemy. Her small size compared to the League's powerhouses could add an interesting dynamic, like a little but mighty hero among giants.