Well, in a Naruto controls glass fanfiction, perhaps Naruto's power over glass is related to a new form of chakra. He might start off not knowing how to control it well. So, he has to train with someone like Kakashi. They could go to a special place filled with glass - like structures. There, Naruto learns to manipulate the glass in different ways, like making glass clones that can confuse his enemies. And as he gets better, he uses this power to protect his village from a new threat that is immune to normal attacks but vulnerable to glass - based ones.
It could strengthen his relationship with his friends. For example, they might be in awe of his new power and support him in mastering it. His friends could also help him find new ways to use the glass - controlling ability in battles.
Foxes are quite common. Given Naruto's connection with the Nine - Tailed Fox, it makes sense that in fanfiction, he might be able to control other foxes. They can be used for scouting or as distractions in battles.
In this fanfiction, Naruto's ability to control shadows could be related to his connection with the Nine - Tails. Maybe the power of the Nine - Tails unlocks this new ability within him. He could use the shadows to form shields against attacks, or even to travel quickly from one place to another by using the shadows as a sort of transportation network within the ninja world.
The Akatsuki members might also be antagonists. Since they're after the tailed beasts, Naruto with his additional power of lightning control would be a prime target. They might send their most powerful members like Pain or Itachi to deal with him.
Well, it could be about Naruto using his chakra to control paper in unique ways. Maybe he creates paper constructs for battle or uses it to send secret messages.
In a 'Naruto controls necromorphs' fanfiction, Naruto would bring his own set of values from the Naruto universe. His sense of justice and protection might lead him to try and use the necromorphs for good, like using them to protect a village or an area from other threats. However, he would also have to deal with the fact that necromorphs are grotesque and often uncontrollable creatures in their own right.
Obviously Naruto would be the main character as he has the power to control vacuums. His friends like Sasuke and Sakura could also be involved. Sasuke might be skeptical at first about this strange new ability of Naruto's. Sakura could be trying to find a scientific explanation for it, thinking it has something to do with Naruto's unique chakra nature.
It could be the Akatsuki. Since Naruto has this new power of controlling space, they might see him as an even greater threat and target him more aggressively. Their own powers and goals would likely clash with Naruto's new - found abilities.
One possibility could be that Naruto discovers a new jutsu that allows him to control inanimate objects like vacuums. He could use this power to clean up after battles or even as a new form of defense. For example, he might make the vacuums suck up incoming attacks or use them to disorient opponents by creating a whirlwind of debris.