Thor would likely be portrayed as a powerful and proud warrior. His noble nature would shine through as he fights alongside the Justice League. He'd probably be a bit brash at times, charging into battle without much hesitation, but also showing great loyalty to his new comrades.
Well, if we consider Batman, he doesn't have superpowers like Thor or most of the Justice League members. But he's a brilliant strategist. In a fight against Thor, he might use his gadgets and knowledge of Thor's weaknesses (if he found any) to try and win. However, Thor's raw power is a huge factor. On the other hand, against the entire Justice League, Thor would have to be very strategic himself. He could target the more vulnerable members first, like Flash who might be caught off - guard by Thor's attacks. But the combined powers of the Justice League could overwhelm him.
Often, the Justice League's hatred for Batman in fanfiction is demonstrated by their actions. They might exclude him from important missions or decisions. For instance, they could form a subgroup within the league and intentionally leave Batman out, showing that they don't want him involved. This can also be seen in the way they interact with his ideas. They may quickly dismiss any suggestions he makes without proper consideration just because of their dislike for him. And sometimes, they may even plot against him in the fanfiction, trying to undermine his influence within the Justice League.
She could be portrayed as a powerful magic - user who aids the Justice League with her unique skills. Maybe she uses her spells to solve problems that the League's normal powers can't handle, like using a spell to break through a magical barrier that's blocking their way.
A Rinnegan - having character could team up with Batman. Batman would be intrigued by the new powers and would want to study them. Together, they could come up with strategies that combine the high - tech gadgets of Batman and the otherworldly abilities of the Rinnegan. The character could use the Rinnegan's ability to absorb and release energy to power up some of Batman's devices in a pinch.
Naruto's chakra could potentially power or enhance the Justice League's technology. For instance, if there's a device that needs a lot of energy, Naruto could channel his chakra into it. His ability to control chakra precisely might also help in fine - tuning some of the more complex tech.
The Flash might initially be in denial. He's used to Batman always having a plan and his death would be a huge shock. He would then turn his speed into a tool for investigation, trying to find out exactly what happened. Green Lantern could feel a sense of loss but also be spurred into action, using his ring to try and prevent future tragedies like Batman's death. He might create constructs in Batman's memory to inspire the team.
Some of them might be amused. They could find the different takes on their characters and stories quite entertaining. For example, Superman might chuckle at a fanfic that has him in a comical situation.
A crossover might explore the cultural differences. Thor comes from a Norse - inspired realm, while the Justice League is more of a modern, Earth - based superhero group. Fanfiction could delve into how Thor reacts to the technology of the Justice League, like Batman's gadgets. And how the JL members view Thor's magic and his connection to the gods.
One interesting storyline could be Thor joining the Justice League during a major threat from a powerful cosmic entity. His godly powers, like his lightning and strength, would add a new dynamic to the team's battles. For example, he could team up with Superman to take on an enemy that can manipulate gravity. Their combined strength and different power sets would make for an epic showdown.
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.