In the plot of such a fanfic, it might begin with Naruto already having knowledge of the Justice League. Maybe through some sort of prophecy in his own world. He decides to test his skills against them. He travels to their universe and challenges them one by one. For Superman, he could use his chakra to create a powerful energy shield that can withstand Superman's heat vision and then use his Rasengan to send him flying. Against Batman, he uses his ninja stealth to avoid his gadgets. With Aquaman, he uses his water - walking and water - based jutsu to overpower him. As he progresses through the battles, he gains more confidence and eventually defeats all of the Justice League members, proving himself as a formidable fighter even in a different universe.
Well, in a fanfic anything can be possible. Naruto has his own set of powerful jutsu like the Rasengan and Shadow Clone Jutsu. The Justice League members also have their unique powers. But if the writer of the fanfic wants Naruto to win, they can create scenarios where Naruto's speed, strategy, and chakra powers outwit the JL. For example, Naruto could use his clones to confuse Superman while using a Rasengan to take him out. Then he could use his shadow clones to distract Batman and use his chakra control to disable Cyborg's systems. It really depends on how the fanfic is written.
The plot could start with Ace being in trouble in the Justice League's world. Maybe he's been captured by an enemy of the League. Naruto somehow gets wind of this and decides to help. He travels to the Justice League's realm and starts his search for Ace. Along the way, he meets some of the Justice League members who are initially skeptical of him but then see his potential. Together, they find Ace and Naruto uses his jutsu to defeat the bad guys and free Ace.
If we consider a fanfiction of Kyuubi Naruto and the Justice League, the cultural differences between the two universes would add depth to the story. Naruto's world is filled with ninjas, chakra, and elemental powers. The Justice League, on the other hand, has heroes with superhuman abilities based on different concepts. When combined, Naruto might have to adapt to the more modern and high - tech world of the Justice League. At the same time, the League members could learn about the importance of honor and loyalty in Naruto's world. It could lead to some really cool character development and epic battles.
Well, it could be really cool. Maybe Naruto and his friends could team up with the Justice League to fight a common enemy. For example, they might face a powerful villain who has the ability to control both chakra and some kind of super - power from the DC universe. Naruto could use his Rasengan while Superman uses his heat vision in a joint attack.
It could have Naruto characters in the Justice League universe. Maybe Naruto uses his shadow clone jutsu to confuse the villains that the Justice League is facing. And Superman might be intrigued by Naruto's chakra powers.
In this fanfiction's plot, there could be a rift in the space - time continuum that brings Naruto to the DC Universe where the Justice League exists. The League is in chaos as their powers are being nullified by a strange force. Naruto, being a stranger to this world, starts exploring and discovers the source of the problem. He uses his own chakra to create a shield around the League members to protect them from further harm. Then, he embarks on a journey to find a way to restore their powers. Along the way, he bonds with the League members, and they learn from each other. Finally, Naruto figures out a way to reverse the nullifying force and the Justice League regains their powers and they all defeat the ultimate evil behind it.
Well, it could be that Naruto uses his shadow clone jutsu to overwhelm the Justice League members. Maybe he'd start with Batman, using his speed and clones to catch him off guard. Then for Superman, he might use some of his more powerful jutsu like the Rasengan, powered up with Sage Mode. But it's really a wild and crazy concept as the two universes are so different in power scales and nature.
Well, Naruto's ninjutsu would be a wild card. His shadow clone jutsu could potentially overwhelm the Justice League. But then, Superman's super strength and speed are no joke. Batman would probably be strategizing like crazy to figure out Naruto's abilities. It could be a really interesting fight, with Naruto's chakra powers against the superpowers of the Justice League members.
Well, in such a 'naruto vs justice league fanfic', there would be a clash of two very different universes. The Justice League has high - tech gadgets and superpowers based on different concepts. Naruto, on the other hand, has his chakra - based abilities. It could be that Naruto uses his Sage Mode to take on Batman's strategic mind and combat skills. And Flash's speed could be countered by Naruto's ability to react quickly with his Sharingan - like perception skills if he had them in this fanfic.
In a 'Harry Potter Justice League crossover fanfiction', there would be a lot of interesting interactions. The wizards from Hogwarts and the superheroes of the Justice League would have to figure out how to work together. For example, Batman would be intrigued by the magic of Hogwarts and might try to analyze it scientifically. At the same time, Hermione could learn a thing or two from Batman's detective skills. And when it comes to facing a common enemy, like an alien sorcerer, they would combine their powers. The Flash could use his speed to quickly deliver magical items that the wizards need in battle, while the wizards use spells to protect the Flash from magical attacks.