Peter could be integrated into the Justice League in a fanfiction by having a shared enemy. Suppose a villain is using technology from both Peter's world and the Justice League's world. This forces them to team up. Peter's agility and the League's superpowers combined could make for an interesting dynamic. He could learn from the more experienced heroes, and they could in turn learn from his resourcefulness and his ability to operate on a tight budget with his self - made gadgets.
One idea could be that Peter Parker gets accidentally transported to the Justice League's universe. He could initially be seen as an outsider, but then prove his worth with his spider - sense and acrobatic skills during a battle against a common enemy. For example, against a powerful alien invader where his ability to quickly assess threats and react would be very useful.
Spider - Man could fit in as the tech - savvy member. His knowledge of creating his own web - shooters and other gadgets could be useful for the Justice League. He could upgrade their equipment or come up with new ways to fight villains.
Naruto would fit in by being the energetic and determined member. His loud and boisterous personality would contrast with some of the more reserved members of the Justice League. His physical abilities, like his superhuman strength and speed gained from his ninja training, would make him a valuable addition in battles.
He could fit in by being a mentor figure. The Justice League has many young and inexperienced members. Wolverine's long life and countless battles give him a wealth of knowledge. He could train them in hand - to - hand combat and survival skills. His presence would also add a sense of danger and unpredictability to the team. Imagine a scenario where the team is infiltrating a Lex Luthor - controlled facility. Wolverine would be the one leading the way through the dangerous traps and guards, using his senses and combat instincts.
Naruto's strong sense of justice and his will to protect his friends and village are qualities that would make him a great addition to the Justice League. He could relate to Superman's desire to protect the world and Batman's commitment to justice. Also, his growth as a ninja could be paralleled with the growth of the Justice League as a team, learning from each other's experiences and skills.
In fanfiction, Iron Man could be a sort of wildcard addition to the Justice League. He might not always follow the traditional superhero code that the others abide by. For instance, he could use more extreme measures to stop villains, which could lead to debates within the team. But his wealth and resources would be a great asset. He could fund new projects for the Justice League, like building a new satellite headquarters with state - of - the - art technology. He could also share his Iron Man suits with other members in emergency situations, though they might need some time to get used to the high - tech controls.
In fanfiction, Goku Black could be incorporated into the Justice League as a sort of experiment. The League, always looking for ways to increase their power and protect the world, might see his abilities as a valuable asset. However, his different moral code and origin from another universe would create a lot of tension. There could be a story arc where the League tries to reform him or at least control his more violent tendencies while using his power to fight against threats that are beyond their normal capabilities.
He could also be a great addition in terms of combat strategy. Black Panther has been trained in various forms of combat and his leadership skills in battle would be valuable. He could work with Wonder Woman in leading the team during fights, using his stealth and her strength to their advantage.
Naruto could be like a new and unique member. His ability to use ninjutsu would be a fresh addition. And the Juubi could be a power source or a danger they have to deal with. Maybe Naruto uses his skills to help the Justice League understand the Juubi better.
In a crossover, Ichigo could bring his own set of moral values. The Justice League has its own code of ethics, and Ichigo's Shinigami code could add a new dimension. His experience in dealing with Hollows and protecting the living could translate well into the Justice League's mission of protecting the world. He might even introduce the concept of soul purification to the League, which could be a unique approach to dealing with certain villains.