In some fanfictions, Naruto's lost memories and the fox are related to an ancient prophecy. The story could be that Naruto was meant to forget his past life as part of a grand plan to defeat a great evil. The fox, being a powerful and mysterious entity, has its own motives in all this. It might be trying to guide Naruto in a certain direction while he's clueless about his identity. His friends notice his strange behavior and start to investigate. Along the way, they uncover secrets about Naruto's past that even he didn't know, and the fox is at the center of it all, holding the key to his true self and the future of the ninja world.
One interesting plot could be Naruto forgetting all his ninja skills. So he has to start from scratch, relearning basic jutsus. This would make for a great character development arc as he discovers his old abilities in new ways.
One possible plot could be that Naruto, as a fox, has to navigate the Hidden Leaf Village in a new form. He might struggle to communicate with his friends at first, but then discovers new ways to convey his thoughts, like through telepathy. Another idea is that he uses his new fox form to explore areas of the forest that were previously off - limits to him as a human. This could lead to him finding ancient secrets or new forms of chakra.
One possible interesting plot could be Naruto using his fox form to outwit enemies in a way he couldn't as a human. For example, he might be able to use his natural fox agility to escape traps more easily.
One interesting 'Memories of Uzumaki Naruto' fanfiction could be about Naruto's memories of his early days in the ninja academy. It might focus on his struggles with being an outcast and how those memories shaped his later determination to become Hokage.
The fox can make Naruto more instinctive. Without his memories, he might rely more on the fox's instincts. For example, he could be more aggressive in battle or more wary of strangers, like how a wild fox would be.
One interesting plot could be Naruto being found by a hidden group who wants to use his power for their own ends while he's in his memory - lost state. They could manipulate him into believing he's one of them.
Well, one interesting plot could be Naruto having to rely on his friends in a whole new way as a baby fox. Since he can't communicate as he used to, his friends have to figure out his needs through his actions. Another plot might be that Naruto discovers new abilities or powers in his baby fox form that he didn't know he had before.
In a female Naruto fox Kyuubi fanfiction, a great plot could be her having to prove herself to the village. Since she's female and has this connection to the Kyuubi, some villagers might be more skeptical or even afraid of her. She then has to go on a journey to show that she can control the Kyuubi's power and use it for good. Along the way, she meets other characters who either help or hinder her progress. And she might also discover secrets about the Kyuubi's origin that no one in the village knew before.
Well, in some fanfictions, the fox god could be a mentor to Inari. It could teach Inari about ancient ninja arts that were long forgotten. This would not only enhance Inari's skills but also make him a more important figure in the Naruto universe. He could then use these skills to face off against new and dangerous enemies.
A great 'naruto fox tail' fanfiction could revolve around the idea that the fox tail can transform into different objects or weapons. Naruto discovers this ability by accident and has to learn how to control it. This could lead to some really unique battle scenes where he surprises his opponents with his newfound power. Some fanfictions might also explore how his friends react to this new aspect of Naruto's powers related to the fox tail.