The fanfic could be about a dimension - hopping adventure. Naruto accidentally ends up in Mizore's world. Their first encounter is hostile as they don't understand each other. Mizore attacks Naruto with her ice powers, thinking he's an intruder. Naruto retaliates with his ninja techniques. But as they interact more, they realize they have more in common than they thought. They could be on a quest to find a way to send Naruto back home while also dealing with threats in Mizore's world.
Naruto would probably win in the long run. He has a lot of experience fighting powerful opponents. He's faced Akatsuki members and other strong ninja. His ability to adapt and learn new techniques quickly would give him an edge. Mizore is strong with her ice powers, but Naruto could potentially find a way around them. For example, he could use his Fire - Style techniques to counter her ice. Also, Naruto has the power of friendship and teamwork on his side which could give him an extra boost in a fight.
One possible plot could be that Mizore, who is from a different world or dimension, somehow ends up in the Naruto universe. Naruto, being the curious and friendly ninja he is, decides to help her find her way back. Along the way, they face various challenges together and learn about each other's powers and cultures.
Well, it could be about a dark version of Naruto having different goals and values from the original Naruto. Maybe the black Naruto wants to take over the Hidden Leaf Village by any means, while the real Naruto tries to stop him to protect his home and friends.
Maybe in the fanfic, there is a dark force that tries to manipulate Hiashi into attacking Naruto. The fanfic could explore how Naruto tries to reach out to Hiashi, to show him that they are being played. Along the way, they have an intense battle where Naruto shows off his new jutsus and Hiashi uses his clan's most secret techniques. In the end, they realize they were on the same side all along.
A fanfic plot could be that Acrpnolgia was once a powerful ninja in Naruto's world but was banished long ago due to his dangerous and unethical experiments. He returns now with a grudge and enhanced powers. Naruto is tasked with stopping him as he is seen as the hope of the village. During the battle, Naruto tries to understand Acrpnolgia's motives and find a way to end the fight without having to kill him, but Acrpnolgia is so consumed by his hatred that it becomes a very difficult task for Naruto.
In a 'Naruto Monsters vs Aliens' fanfic, perhaps the aliens are trying to enslave the people of the Naruto world. The monsters, which were once feared by the villagers, now become unexpected allies. Naruto, with his belief in friendship and understanding, tries to bridge the gap between the two groups. He might train with the monsters to learn new combat techniques and in turn, teach them about the importance of unity. Together, they could fight against the aliens' mind - control devices and save the world.
Well, it could be that Naruto uses his new Sage of Six Paths powers to combat the Juubi. Maybe he has to find a way to break through the Juubi's defenses which are super strong. He might also get some help from his friends at some point in the fanfic.
A plot might involve Shukaku being controlled by an evil force and Naruto has to fight it to save the village. Naruto starts by trying to reason with Shukaku, but when that fails, he has no choice but to engage in a fierce battle. He might call upon the help of his friends like Sasuke or Sakura at some point to create a strategy to defeat Shukaku.
One idea is that Mizore and Shirayuki's world is on the verge of destruction due to a natural disaster. Naruto, with his ninja skills and determination, tries to help them stop it. However, they soon find out that the disaster was actually caused by a dark wizard from the Naruto universe who escaped there long ago, and now they have to defeat him to save both worlds.
One possible plot could be that Naruto and his friends discover a strange new world where plants have to fight off zombies. Naruto, with his ninja skills, decides to help the plants. He could use his shadow clone jutsu to multiply and fend off waves of zombies. The plants, in turn, could offer Naruto and his team special powers like the ability to shoot fireballs from their mouths, just like some of the plants in the game do.