The Justice League typically includes well-known heroes like Superman, Batman, Wonder Woman, The Flash, Green Lantern, Aquaman, and others. These characters form the core team.
I think Flash himself would be really interested. After all, it's about him. He'd be curious to see how the writer of the fanfiction portrays his character, his powers, and his relationships with the other members of the Justice League.
Batman would probably be more critical. He'd analyze how the fanfiction portrays his detective skills and his relationship with the other members of the Justice League. He might not like it if the stories make him seem too soft or too brutal, as he has a very specific self - image.
Wonder Woman is also very powerful. She has superhuman strength, combat skills, and her Lasso of Truth can force people to tell the truth. Her bracelets can deflect attacks. She is a key member in battles. Well, she comes from an island of powerful Amazons and her powers are a combination of her divine heritage and training.
Some might be shocked. For instance, Batman is often portrayed in very different ways in fanfiction compared to his 'canon' self. Superman might raise an eyebrow at a fanfic where Batman is overly emotional. Others like the Flash might be really into it, finding the different takes on Batman's character and his adventures exciting.
The OC's personality can be very distinct. They could be extremely humorous and use that to lighten the mood during tense situations. This would be different from the more serious natures of some of the Justice League members like Batman. Also, they could have a strong moral code that is not exactly the same as the League's, which would lead to interesting discussions and interactions.
Iron Man's cocky and self - assured personality could either clash or complement the Justice League members. His confidence might annoy some like Superman who is more humble, but it could also inspire others like Flash. Batman might respect his technological prowess but be wary of his impulsive side.
In this fanfiction, Naruto's power is a force to be reckoned with. He has a vast array of ninjutsu skills at his disposal. The Justice League members, on the other hand, are a mix of super - humans and meta - humans. Superman's strength is almost limitless, and Aquaman has his control over the sea. Naruto's ability to defeat villains in this context might put him in a position where he has to prove himself against the Justice League. His shadow clone jutsu could potentially overwhelm some of the League members in terms of numbers, but they have their own unique ways of countering such attacks. It really depends on how the story unfolds and how the powers are balanced in this crossover fanfiction.
Sasuke's interaction with the Justice League would be complex. He might start off aloof, especially with the more 'cheerful' members like Flash. But he would be drawn to Wonder Woman's warrior spirit. They could have some interesting conversations about honor and combat. Aquaman, with his connection to the sea, might be a bit of an enigma to Sasuke at first. Overall, Sasuke would be constantly evaluating how these new allies or potential rivals fit into his view of the world.