A good storyline might involve the 5th Raikage training a new generation of shinobi in the Hidden Cloud. He could discover a young prodigy and take it upon himself to mold them into a great ninja. This would include teaching them not only combat skills but also the values of loyalty and perseverance. For example, he could send the young ninja on difficult missions to test their mettle and grow their skills. And as they face setbacks, the Raikage would be there to offer guidance and motivation.
Naruto could be a great character to pair with the 5th Raikage. Their interactions could explore the relationship between the Hidden Leaf and the Hidden Cloud, and they could team up to face a common enemy.
One interesting storyline could be Naruto's journey in adapting to the new responsibilities of being the 6th Hokage. He might face challenges like dealing with internal village politics, which he has never been very interested in before. Another could be how he balances his family life with Hinata and their children while being the Hokage.
Maybe a story where they both find themselves in a dangerous situation outside of their respective villages. They have to rely on each other's skills and powers to survive, and in the process, a deep friendship or more could develop. For example, they could be trapped in a mysterious and dangerous forest filled with powerful beasts.
One popular naruto raikage fanfiction is 'The Raikage and the Jinchuriki'. It tells the story of the Raikage's relationship with the village's Jinchuriki. Additionally, 'Raikage: Beyond the Thunder' shows the Raikage's adventures outside of his village and how he represents it on a larger stage.
There could be a storyline where Naruto, as a fan of the 4th Hokage, gets to time - travel back to the era of the 4th Hokage. There, he could interact with his father, learn from him directly, and even help him in some of his battles. Or maybe Naruto tries to prove himself worthy of being the 4th Hokage's successor in a more intense and unique way compared to the original story.
One idea could be a story where the Raikage has to team up with Naruto to face a new, powerful enemy from outside the Hidden Cloud Village. This would force them to combine their unique skills and leadership styles.
One interesting Naruto Raikage fanfiction could be about their unexpected alliance during a major battle. They put aside their differences and combine their powers to defeat a common enemy. This kind of story can explore their characters in a new light and show how they grow to respect each other.
Power is a common theme. Since the Raikage is known for his strength, many fanfictions explore how he gains more power or uses his existing power in different situations.
The plot could also involve Naruto trying to convince the Raikage to change some of the Cloud Village's more isolationist policies. As Naruto has a vision of unity among all the ninja villages, he sees the Raikage as a key figure to help him achieve this. The Raikage, initially resistant, might gradually come around to Naruto's way of thinking as they spend more time together.
A good storyline could involve Azula's redemption through her interactions with Naruto. Naruto, with his belief in the good in people, could try to help Azula overcome her dark past. Maybe they start off as enemies, but as they face challenges together, Azula begins to change. For example, they could be on a mission to stop a powerful dark wizard who is trying to take over both the Fire Nation and the Hidden Leaf Village.