One possible plot could be that Naruto is suddenly bestowed with Superman's powers. He has to hide it from his friends at first because he doesn't understand it. Then, as he starts to master these powers, he uses them to protect the Hidden Leaf Village from a new and powerful threat that normal ninja techniques can't handle.
At first, there might be some misunderstandings. Naruto is used to the shinobi world and its ways, while Superman is all about truth, justice, and the American way. But as they spend more time together, they would start to respect each other's strengths. Naruto would admire Superman's raw power, and Superman would be impressed by Naruto's strategic thinking and his ability to come back from tough situations.
He could develop the ability to combine his chakra with Superman's powers. For example, he might be able to use his Rasengan while flying at super - speed. Or he could infuse his chakra into his heat vision to make it even more powerful.
In a fanfic, their different origins could play a big part. Naruto, an orphan ostracized by his village at first, and Superman, an alien orphan. They could bond over their shared feelings of being alone at the start. Superman could teach Naruto about his Kryptonian heritage and how to embrace it, while Naruto could show Superman how he overcame the hatred in his village and turned it into love and loyalty.
One possibility could be that Naruto somehow gains Superman - like powers. Maybe through some strange scientific experiment or a magical encounter. He could then use his newfound abilities, like super strength and flight, in combination with his ninja skills. For example, he might use super speed to perform his shadow clone jutsu even faster, overwhelming his enemies in a way that was not possible before.
Naruto could use his Rasengan with Superman's strength. Imagine the power of a Rasengan thrown with Superman - level force. It would be extremely destructive.
One scenario could be that Naruto uses his shadow clone jutsu to overwhelm Superman. The clones could attack from all directions, and while Superman is busy dealing with them, Naruto could prepare a powerful Rasengan. Another scenario might be Superman using his heat vision to try and stop Naruto's summons, like the giant toads. But Naruto could use his speed and agility to dodge and counter - attack.
In a fanfic, there could be a scenario where Naruto and Superman start off as enemies but then realize they have a common enemy. They then team up against this new threat. During their initial fight, Superman might underestimate Naruto's speed and agility, which are enhanced by his ninja training. Naruto, on the other hand, might be initially shocked by Superman's sheer power. But as the fight progresses, they could come to respect each other's abilities and decide to work together.
One interesting crossover could be Naruto learning about Superman's powers. Maybe Naruto is intrigued by Superman's ability to fly and his super strength. He might try to incorporate some of those elements into his own jutsu training. For example, he could study how Superman uses his strength in combat and adapt it to his taijutsu.
Well, perhaps it could be about Naruto getting Superman - like powers. Maybe he could fly around Konoha like Superman soars over Metropolis. He might use his super strength to protect the village from threats that are too powerful for normal ninja skills.