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.
He might fit in by being a symbol of hope like Superman. Naruto has always been about protecting his village and the people he cares about. In the Justice League, he could extend that to protecting the whole world. His ability to make friends easily would also help him bond with the other members. For example, he could befriend The Flash and they could have races while also training together. And his Nine - Tails power could be a huge boost in battles against strong enemies.
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.
Hermione is used to working in a team at Hogwarts. So she would likely adapt well to the Justice League's group dynamic. She could form special bonds with different members. For example, she might bond with Wonder Woman over their mutual strength and intelligence. And with Flash, she could share her experiences of using quick thinking in difficult situations. Her presence would add a new layer of complexity and versatility to the League's interactions.
Slytherin is also a possibility. He has to be resourceful to make his own web - shooters and manage his double life. In Hogwarts, he might use his cunning to get out of tricky situations, like when dealing with the mysteries and politics within the school. However, his moral compass would likely keep him from the more negative aspects of Slytherin. He would probably be a different kind of Slytherin, one who uses his wits for good.
An Immortal OC could be a mentor figure. Since they've been around for so long, they can offer unique insights and wisdom to the younger, less - experienced members of the Justice League.
In fanfiction, Ghost Rider might fit into the Justice League as a sort of spiritual guide. Given his connection to the supernatural and his role as a spirit of vengeance, he could help the League members deal with threats that have a more otherworldly or moral aspect. For instance, when facing a villain who has escaped justice through legal loopholes, Ghost Rider's sense of absolute justice could inspire the Justice League to find new ways to bring the villain to account.