Perhaps Ghost Rider has a conflict with some of the more morally upright members of the Justice League at first. He operates in a more gray area, and they might not trust his methods. But over time, they come to respect his power and his sense of justice. For example, when dealing with a villain who has a connection to the occult, Ghost Rider's knowledge and abilities prove invaluable, and he earns their trust.
In a fanfiction, the Ghost Rider could form an alliance with Batman. Batman would be intrigued by the supernatural element that Ghost Rider brings. They could team up to take on villains who are using magic or other dark forces. Ghost Rider's powers of hellfire and his unearthly strength would be a great asset to the Dark Knight's strategic mind.
The fanfiction could explore a scenario where the Justice League initially mistakes Ghost Rider for a threat. After some misunderstandings and battles, they realize he is on the same side and they start to work together. Ghost Rider could teach them some things about the supernatural side of their world that they were previously unaware of, and in turn, the Justice League could help Ghost Rider in dealing with earthly threats that he might not be used to handling on his own.
A common theme is the clash of different moral codes. The Justice League generally has a more 'do - gooder' approach, while Ghost Rider's justice is often more about vengeance. Another theme is power - related, like how the League deals with Ghost Rider's otherworldly powers.
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.
Sure, there are some great ones. One type of 'Justice League Ghost Rider fanfiction' might be a darker, more edgy take on the superhero genre. Given Ghost Rider's nature, it can add a lot of grit to the usually more 'light - hearted' (comparatively) Justice League world. These stories can explore moral gray areas and complex character relationships, such as how the League would deal with Ghost Rider's methods of justice which are often more extreme compared to their own.
A third possible storyline could be a story of misunderstanding at first. The two groups could initially see each other as threats. For instance, the Justice League might mistake the Z - fighters' high power levels as a sign of aggression. However, through a series of events and battles, they come to realize that they are on the same side and must work together to face greater threats. This could involve some epic one - on - one battles between characters like Vegeta and Superman before they finally team up.
Another storyline might involve Batman leaving because of a personal crisis. For example, he discovers something dark about his past that makes him question his place in the Justice League. He might think that he's a liability to the team and decide to leave to protect them.
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.
One possible storyline could be that Batman sacrifices himself to save the world from a powerful alien threat. He uses his intellect to devise a plan that requires him to give his life. Another could be that he is poisoned by a new villain in the Justice League Unlimited universe, and despite the efforts of his friends, he succumbs to the poison.
Perhaps there's a story where Batman joins the Justice League just in time to help prevent an alien invasion. The League is struggling against a technologically advanced alien race, and Batman's strategic mind is the key to formulating a plan. He uses his resources and knowledge of Earth - based technology to create counter - measures against the alien weapons. Along the way, he forms bonds with his new teammates, especially with Wonder Woman, who respects his tenacity and intelligence. This experience makes him more integrated into the Justice League and changes his perspective on the larger scope of protecting the world.