One interesting plot could be that the world is on the verge of destruction due to a natural imbalance. Naruto, being the hero, has to figure out a way to restore this balance. He might have to journey to the elemental nations' spiritual cores and perform some kind of ritual. In this fanfic, he could also have some new powers that are related to nature itself, like the ability to communicate with all living things to understand what went wrong with the balance and how to fix it.
Well, first of all, Jiraiya might return in some form, like a spirit guide or something, and be an ally to Naruto. Tsunade would also be there, using her leadership and medical ninjutsu. And then there are the new generation characters like Boruto. He could learn from Naruto and help out, seeing as he also has his own unique abilities. The Allied Shinobi Forces from the previous big battles might also reunite to support Naruto in saving the world.
One possible scenario could be that Naruto, with his powerful jutsu and quick thinking, arrives in the world of Rias just in time to save her from a powerful enemy. Maybe it's a demon or a dark magic user. His speed and strength would be a great asset in this situation.
In this fanfic, Naruto might save Hiashi in a battle situation. Maybe Hiashi is facing a powerful enemy that he can't handle alone, and Naruto steps in with his strong ninja skills. For example, if Hiashi is being attacked by a group of rogue ninjas, Naruto could use his Rasengan to fend them off.
One possible scenario in a 'Naruto Saves Hiruzen' fanfic could be that Naruto uses his newfound powers. Maybe he has mastered a new jutsu that allows him to turn back time briefly. He then uses this power to go back to the moment when Hiruzen is in danger. Naruto's quick thinking and his never - give - up attitude would be highlighted in such a fanfic.
Perhaps Naruto discovers a prophecy that Hiruzen will be in danger. So, he starts to train extra hard to be able to face whatever threat is coming. When the time comes, he uses his speed, which he has enhanced through rigorous training, to reach Hiruzen before the enemy can land a final blow.
There's also 'When Naruto Saves Sakura from the Darkness'. In this one, Sakura gets trapped in a dark magic - created world. Naruto uses his new - found powers and his unwavering will to break into that world and bring Sakura back. It has some really interesting concepts about the Naruto universe and how Naruto's love for Sakura can overcome any obstacle.
It could be an unknown girl from a random village that Naruto just happens to pass by and save from a natural disaster, like a flood or a landslide. Naruto's quick reflexes and strength would allow him to rescue her.
Kakashi might also be there to assist Naruto. His wisdom and combat skills are always useful. He could provide strategic advice and even jump into battle when needed.
Here are a few recommendations for fantasy novels where the protagonist saves the world:
1. " The Sorceress of the World of Sorcery ": The protagonist of this novel was a scientist from a high-tech world. Because he had transmigrated to a Western fantasy world in the Middle Ages, he became a sorcerer-apprentice of a small noble. He had the characteristics of an intelligent, cold, cautious, calm, and egoistic person. Through his own hard work and decisiveness, he had saved the world.
2. [Perfect World]: This novel mainly described the growth of the main character, Shi Hao. Through continuous hard work and struggle, he finally became a powerful warrior and successfully saved his family and the entire continent.
3. The Great Dominator: The protagonist of this novel successfully saved his family and the entire world through hard work and struggle.
4. Storm Archmage: This is a young man who transmigrated to the world of Azeroth. Through the story of saving the world and pursuing justice and humanity, it shows how the protagonist struggles on the Azeroth Continent without dying.
5. " After Rebirth, I Save the World ": This was a fantasy romance novel. It told the story of the female protagonist, Su Qing, who was reborn back to Earth 300 years ago. She had the cultivation of a World King and tried to save the entire world.
Please note that the novels recommended above are based on the search results provided. There may be other suitable fantasy novels that have not been mentioned.