What could be a great plot for a Prototype crossover Justice League fanfic?

Another possibility is a more comical crossover. The Flash tries to race a Warthog from Halo and fails miserably because he doesn't understand the vehicle's controls. Or Batman trying to figure out the technology of Halo's weapons and getting all confused. This kind of fanfic would be full of humorous moments and cultural clashes between the two universes.

Power struggle is a common theme. The Prototype characters often have different and sometimes more brutal powers compared to the Justice League. So, there's always this tension of who is more powerful and how they'll use their powers in a crossover.

Maybe the plot could involve a device created by Lex Luthor that accidentally merges the two universes. Spider - Man then teams up with the Justice League to find a way to separate the universes again. During this time, he has to deal with the different personalities and powers of the League members. He might form a special bond with Batman, as they both rely on their wits and gadgets.

One idea could be that Voldemort discovers a way to enter the DC universe and teams up with some of the Justice League's villains like Lex Luthor. The Hogwarts students and the remaining members of the Justice League have to join forces to stop them. The wizards can use their magic while the superheroes use their powers.

Well, one possible plot could be that the Justice League and the Marvel heroes are brought together by a powerful cosmic entity to fight a common enemy that threatens both their universes. Maybe Thanos teams up with Darkseid, and the combined forces of Superman, Batman, Captain America, and Iron Man have to figure out how to work together to stop them.

The plot could start with Vegeta being exiled from his own planet due to some political intrigue. He ends up on Earth, where he crosses paths with the Justice League. At first, there is tension as the League is unsure of his intentions. But when a powerful enemy, like Darkseid, starts to target Earth, Vegeta decides to help. He teams up with Superman, and they have an epic battle of strength. Meanwhile, Batman uses his detective skills to figure out a weakness in the enemy's plan. Wonder Woman, Aquaman, and Flash also play their parts, with Vegeta adding his Saiyan speed and power to the mix. In the end, they defeat the enemy, and Vegeta decides to stay on Earth for a while to learn more about these strange heroes.

One possible plot could be that the Hulk is somehow transported to the DC universe and is initially seen as a threat by the Justice League. They might try to subdue him, but then realize he's not entirely a villain. Maybe there's a common enemy that forces them to team up. For example, a powerful alien force that is causing destruction in both the Marvel and DC universes. The Hulk's brute strength combined with the Justice League's diverse powers could make for an epic battle against this enemy.

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 this fanfic, the Hulk could bring a new dynamic to the Justice League. His lack of restraint might force the League to adapt their strategies. For example, Batman would have to figure out how to control Hulk's rage. And Wonder Woman might find herself in a position where she has to protect Hulk from his own self - destructive tendencies while also using his power to their advantage. It could be a story full of conflict and cooperation.

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.