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.
It could be Orochimaru. He's always been interested in power and new forms of jutsu. Seeing Naruto with Superman - like powers would make him want to either steal those powers for himself or find a way to use Naruto as a tool in his experiments.
A powerful dark wizard could be the main villain. He could be jealous of the clone's unique powers and want to steal them for himself. He might use dark magic to try and corrupt the clone or simply try to destroy it to prevent it from becoming too powerful.
One idea could be that the clone has the powers of both Naruto and Superman. For example, it can use Naruto's shadow clone jutsu while also having Superman's super strength and flight. It could be a hero in a world where both Naruto - style ninjas and super - powered beings exist, fighting against a common enemy that threatens both worlds.
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.
A possible main antagonist could be a powerful alien who sees Naruto as an abomination. This alien might come from Krypton and believe that Naruto, as a clone of Superman, is a perversion of their species' power. The alien would have all the typical Kryptonian powers but with a more malevolent intent. He would try to destroy Naruto and the Hidden Leaf Village, thinking that he is doing a service to the universe by eliminating this 'false' Superman.
I'm not sure specifically as I haven't read that particular fanfic. But it might be a story where Naruto is somehow cloned and has characteristics related to Thor, like maybe having Thor's strength or his hammer. It could be a really wild and creative crossover story.
In a Naruto - Superman powers fanfic, perhaps Naruto gets some of Superman's powers accidentally. He struggles to control the new powers like heat vision and super speed along with his own ninja abilities. Superman, on the other hand, discovers he can use chakra in a limited way and they both have to figure out how to use these new combinations of powers effectively.
Well, theoretically in a fanfic world. Naruto's clone jutsu is quite flexible. If we consider the concept of a clone henge into a blackmail book, it might be used for various narrative purposes. Maybe Naruto is trying to deceive an enemy by making them think there is evidence against them in this 'blackmail book' clone. Or perhaps it's part of a complex plan to uncover a conspiracy where the blackmail book holds the key information. It really depends on the creativity and direction of the fanfic author.
Well, in a 'naruto shadow clone lemon fanfic', perhaps it could be about Naruto creating shadow clones to help in a situation related to a lemon - based task. Maybe there's a lemon grove that needs protecting or a lemon - making competition in the Hidden Leaf Village and Naruto uses his shadow clones to gain an advantage. However, without actually reading the specific fanfic, it's hard to say for sure.