One interesting Naruto and FF15 fanfiction could be a crossover where Naruto characters are transported to the world of FF15. They might interact with Noctis and his friends, and Naruto's ninja skills could be used in the battles against the daemons in FF15's world.
Another great 'Naruto FF7 Fanfiction' idea could be a story centered around a shared enemy. Maybe an ancient evil that threatens both the Naruto world and the FF7 world. Characters from both universes have to put aside their differences and combine their unique powers, like Naruto's Rasengan and Cloud's Omnislash, to defeat this common foe.
One idea could be Naruto being summoned into the world of FF14. He might initially be confused but quickly adapt his ninja skills to the new environment. For example, his ability to use chakra could be translated into a unique form of magic in FF14.
Another interesting concept is to have the chakra system from Naruto integrated into the FF7 universe. Maybe the materia could be enhanced by chakra, or characters could learn to use jutsu instead of magic. For instance, Aerith could learn some healing jutsu to add to her abilities.
Some 'Naruto' fanfictions are really cool. For instance, the ones that give Naruto new powers. Maybe he gets a power related to space - time manipulation that he has to learn to control. This can lead to really exciting adventures and battles. Also, fanfictions that rewrite the whole story from an alternate point of view, like from the view of the Akatsuki members, can be very interesting as it shows a different side of the 'Naruto' universe.
Another one is 'Journey with Ashe and the Oc'. This fanfiction takes a more emotional approach. It explores the oc's backstory and how it parallels Ashe's own journey of self - discovery. The author does a great job of weaving their stories together, making it a very engaging read.
Well, there's a fanfiction called 'Tifa's True Desires'. It shows a different side of Tifa's character in relation to Cloud. It has some really interesting character development along with their romantic and somewhat spicy encounters. But, of course, fanfictions are subjective, and what one person likes, another might not.
Well, there might be a 'Naruto Sanabi' fanfiction that focuses on Sanabi's backstory. It could explore how she came to be in the Naruto universe and what her early life was like. There could also be a fanfic where Sanabi has to face a powerful enemy alone and uses her wits and ninja skills to overcome it. This would show her strength and determination.
One interesting Naruto Damocles fanfiction could be one that focuses on Damocles' backstory in the Naruto universe. It might explore how he came to be in the village and his early training days.
One interesting Naruto Groudon fanfiction could be where Groudon somehow ends up in the Naruto universe. Maybe Naruto has to find a way to send it back while also dealing with the chaos it causes. For example, Groudon's presence might disrupt the natural chakra flow, and Naruto, with his determination, tries to communicate with it using his unique ability to understand others.
Some fanfictions might focus on the relationship between Naruto and Kurohime. It could start as a friendship based on mutual respect for each other's skills. As the story progresses, they might develop deeper feelings for each other, which would be interesting to explore as they both come from very different backgrounds in the Naruto universe.