Perhaps in this fanfic, Kikyo trains Naruto not just in physical combat but also in mental and spiritual aspects. She might teach him how to better control his chakra based on her own experiences with spiritual powers. This could lead to Naruto developing new forms of his jutsu that are more powerful and refined.
Obviously, Naruto and Kikyo are the main characters. Naruto is the one being trained, and Kikyo is the trainer.
One possibility could be a plot where Kagome and Kikyo are forced to work together in a dangerous situation. As they face challenges, they start to understand each other better. In a moment of relief after a narrow escape, there's an unexpected kiss. It could be a kiss born out of newfound respect and a shared sense of purpose.
In a 'Naruto is the Raikage' fanfic, the plot could be that Naruto is transported to an alternate universe where he is the Raikage. He has to quickly adapt to the Cloud Village's culture and politics. He might face a powerful enemy that is targeting the Cloud Village specifically. Naruto then uses his experience from Konoha and his Uzumaki heritage to find a way to defeat the enemy. Meanwhile, he tries to bridge the gap between the different clans in the Cloud Village and bring about a new era of peace and prosperity. There could be a lot of sub - plots involving his relationships with the Cloud ninja, his attempts to improve the village's infrastructure, and his struggle to maintain his own identity while taking on this new role.
One possible plot could be that Naruto somehow gets transported to a world where Deathstroke exists or vice versa. Naruto then has to adapt to Deathstroke's way of fighting and living. He might face challenges where he has to use his new - found Deathstroke - like skills to survive against enemies he's not used to.
One possible plot could be Naruto using his scientific knowledge to improve the ninja world. For example, he might develop new jutsu that are based on scientific principles rather than just chakra manipulation. He could study the properties of different elements in a scientific way and create more powerful and efficient attacks.
In a 'naruto is nero fanfic', perhaps Naruto is mistaken for a powerful being in Nero's world. Nero might initially be cautious of Naruto but then realize they share a common goal of protecting the weak. They could team up to fight against a powerful dark force that threatens both their worlds, with Naruto using his Rasengan and Nero using his Devil Bringer in combination.
Well, if there was a 'naruto is vanitus fanfic', it could be about Naruto somehow inheriting the powers or characteristics of Vanitus. Maybe Naruto has to deal with the new - found powers and how they affect his relationships in the Naruto world, like with Sasuke and Sakura.
Well, it could be about Naruto being a huge fan of Ganondorf's power and trying to incorporate some of his dark and dominating traits into his own ninja style. Maybe Naruto starts to study Ganondorf's strategies and uses them in battles against tough opponents in the ninja world.
Maybe Naruto uses his rap skills to spread his ninja way. He could rap about his training, his friends, and his determination to become Hokage. His raps might inspire other characters in the Naruto universe.
Well, it could be about Naruto becoming the Tenshikage. Maybe he travels to a different village that has this unique title. He might face challenges there, like dealing with new political situations and different ninja clans. He'd have to prove himself worthy of this new title, perhaps by using his unique jutsu and his never - give - up attitude.