One possible plot could be that Naruto and his friends are part of a special military unit in a modern world. They have to use their ninja skills to combat a new type of terrorist threat that uses advanced technology. For example, Sasuke could use his Sharingan to detect hidden enemies or devices, while Naruto's Rasengan could be modified into a powerful weapon against armored vehicles.
A great plot might involve Naruto's world merging with the modern military world. The Hidden Villages become part of a global military alliance. Naruto, as a key figure, has to lead the ninjas in adapting to modern military strategies and weapons. At the same time, they face internal struggles as some ninjas resist the change, fearing the loss of their traditional ninja ways.
Naruto would probably be excited about the new weapons and technology. He'd quickly try to learn how to use guns and modern combat vehicles, while also showing off his ninja skills. Sasuke, on the other hand, would be more reserved. He'd analyze the new military strategies carefully and find ways to incorporate his Sharingan and swordsmanship into modern combat.
Well, a plot could be that an evil force is stealing powers from both the Naruto world and Lucy's world. Naruto and Lucy are the only ones who can sense this. They join forces and embark on a journey to stop this power - stealing entity. Along the way, they face various challenges and learn about each other's cultures and powers.
Maybe Naruto as the ANBU Commander has to deal with internal strife within the ANBU. Some members might be against his unorthodox methods. He has to prove himself not only as a strong ninja but also as a capable leader. He could start by implementing new training regimens that improve the overall strength of the ANBU while also building trust among the members.
The most interesting plot might be Naruto being visited by Acnologia in his dreams. Acnologia starts to teach Naruto some of his secrets in the dream world. Naruto then has to figure out how to apply these teachings in the real world. This causes him to question his own beliefs and ninja techniques as he tries to incorporate what he's learned from Acnologia.
Maybe Naruto discovers an ancient artifact in the Naruto world that has a connection to the Ghost Rider. When he touches it, he becomes the Ghost Rider. Now he has to balance his normal ninja duties with this new, fiery power. He could use the Ghost Rider's abilities to fight new threats that are emerging in the shinobi world, like a group of demons that the normal ninja techniques are ineffective against.
One interesting plot could be that Hiashi discovers Naruto has some hidden connection to the Hyuga clan. This would make Hiashi take a special interest in Naruto, and he might start training Naruto in Hyuga - related skills.
A great plot could involve the resurrection of past powerful ninja to participate in the Tournament of Power. Imagine if the likes of Hashirama and Madara were brought back. Naruto and his allies would have to face not only the current threats but also these legendary ninja. There would be a lot of drama as Naruto tries to understand their motives and also figure out how to defeat them without causing too much destruction.
An interesting plot could be that Anko discovers a hidden ability within Naruto that not even he was aware of. It could be related to an ancient ninja art that has some connection to Anko's family. They then go on a quest to learn more about this ability. Along the way, they face various challenges, like traps set by an unknown enemy who doesn't want them to uncover the secrets of this power. As they progress, they also have to deal with their own personal demons. Naruto has to overcome his fear of not being in control of this new power, and Anko has to face her past traumas related to Orochimaru that resurface during the journey.
Imagine that there's a hidden organization in the Naruto world that has been secretly researching the power of the Ghost Rider. They capture Naruto and try to transfer the Ghost Rider's power into one of their own. But Naruto somehow manages to turn the tables and not only gains the power but also uses it to expose the organization's evil plans. He then uses his new - found Ghost Rider powers, combined with his ninja skills, to take on the leaders of the organization who are themselves powerful ninjas with dark intentions.
Well, perhaps Wei Ying wakes up in the body of a young ninja in the Naruto universe. Since he's used to a world of cultivation, he'd introduce some new ways of training and combat to the ninja academy. He could get into trouble for his unorthodox methods at first but then prove their effectiveness when facing a group of rogue ninjas attacking the village. And he'd form a special bond with Sasuke, who's intrigued by Wei Ying's different power source.