A possible plotline could be that Tayuya is captured by an evil organization, and Naruto goes on a solo mission to save her. He uses his stealth skills to infiltrate the enemy base.
In some fanfictions, Tayuya might be in a life - threatening situation due to a powerful curse. Naruto, with his strong will and determination, finds a way to break the curse and save her. Maybe he has to travel to a far - off place to find the antidote or the solution to the curse. Along the way, he faces many challenges and overcomes them all for Tayuya.
Perhaps Artemis gets lost in a strange dimension that is similar to Naruto's world. Naruto discovers her there and has to protect her from the dangerous creatures in that dimension. He uses his skills and knowledge of the area to lead her to safety. Along the way, they might form an unlikely friendship or even more, depending on the nature of the fanfiction.
In some fanfictions, Naruto could be facing a powerful enemy that he underestimated. Temari steps in and saves him. This event could then trigger a series of events where Naruto starts to study Temari's fighting style to improve his own skills. At the same time, the two of them could get involved in some political intrigue within the ninja villages, as Temari is from Suna and Naruto is from Konoha. Their relationship could be a key factor in the stability between the two villages.
One possible plotline is that Harry is magically transported to the Naruto world and discovers Naruto is in danger from a new, powerful enemy. Harry then uses his magic to fight alongside Naruto and his friends, saving Naruto in the process.
One possible plotline could be that Naruto discovers a hidden threat to Sandaime before anyone else. Maybe he stumbles upon a secret enemy's plan while on a mission. He then uses his unique skills, like his shadow clones, to outwit the enemy and save Sandaime at the last moment. For example, he could create a diversion with his clones while he sneaks up on the bad guys and disarms them.
There are several potential plotlines. For example, a story could revolve around Tayuya and Hinata training together. Hinata could be teaching Tayuya about the gentle ways of the Leaf Village's ninja training, while Tayuya could show Hinata some of the more unorthodox and aggressive techniques she learned in the Sound Village. Another idea is that they are both part of a group that is sent on a diplomatic mission to another village. Along the way, they face various political intrigues and challenges that they must overcome together. Also, a plot could be centered on how they both react to Naruto achieving new levels of power. They might have different perspectives on it, and through their discussions, they grow as characters.
A plotline could involve Naruto finding a hidden power within the Uchiha clan that was overlooked. He uses this power to unite the clan and make them strong enough to resist any threats. Maybe this power is related to an ancient Uchiha technique that Naruto helps to rediscover. He then uses his charisma and leadership skills to convince the Uchiha to work with the village instead of against it.
One possible plotline could be that Naruto, with his powerful ninja skills, suddenly appears in the world where Rias is in trouble with Riser. He might use his shadow clone jutsu to distract Riser while he rescues Rias. Another could be that Naruto uses his rasengan to break through any barriers or attacks that Riser has set up to keep Rias captive. Maybe Naruto is summoned there by some sort of magic or a wish that Rias unknowingly made, and he then uses his chakra to overpower Riser and save Rias.
It could be that a powerful sorcerer in the Avengers' world goes rogue and starts using dark magic. The Avengers don't know how to handle magic, so Harry is called in. He has to face this rogue sorcerer, using his own brand of light magic. Along the way, he might have some clashes with the Avengers' way of doing things, but in the end, they all work together and Harry manages to save the day by defeating the rogue sorcerer and restoring peace in the Avengers' world.
Perhaps Medusa has some crucial information that Percy needs to save the world, and in order to get that information, he has to protect her from other threats. So he embarks on a journey to keep her safe.
The OC could be a wandering ninja who stumbles upon the situation where Kushina is in danger. Maybe they are initially just passing through, but their sense of justice compels them to step in and save her. Then, they might get involved in the larger Naruto world events as a result of this encounter. They could also form a bond with Kushina, which could lead to different relationships with other characters like Minato or Naruto in the future.