One possibility could be that Naruto has a really tough time at first. He might keep failing to perform the jutsu correctly. Maybe he tries to combine it with his Rasengan technique to create a new and more powerful move. For example, he could think of using the speed of Flying Raijin to quickly deliver a Rasengan to the enemy.
One great fanfiction could be 'Naruto: The Raijin Prodigy'. In this story, Naruto discovers a hidden scroll about the Flying Raijin early on. He spends countless hours practicing and eventually masters it in his own unique way. This changes the dynamics of many battles in the story.
Another popular one is 'The Flying Raijin - Naruto's New Edge'. This fanfic focuses on how Naruto's understanding of the Flying Raijin evolves. He starts using it not just in combat but also for strategic purposes, like quickly gathering intelligence or setting up ambushes. It has a really interesting plot that keeps readers hooked.
The plot could start with Naruto finding an old scroll that contains the secrets of Flying Raijin. He is excited but also a bit intimidated as it seems very complex. He begins to practice in secret, away from the village. As he practices, he discovers that he can use his own unique chakra nature to modify the jutsu slightly, making it more his own.
In the online novel " My Senior Brother Is Too Stable ", the Flying Spirit Race was divided into the Spiritual Root Realm, Spiritual Movement Realm, Spiritual Silence Realm, Body Integration Realm, Mahayana Realm, Tribulation Transcendence Realm, Perfected Immortal, Golden Immortal, Immortal King, and Immortal Emperor.
While waiting for the TV series, he could also click on the link below to read the classic original work of " The Legend of Mortal Cultivation "!
Minato could be developed further by exploring his time as the Fourth Hokage more deeply. For example, show his political decisions and how they were influenced by the presence of the Kyuubi. Also, his relationship with other villages could be explored, especially in relation to the Kyuubi's power. Maybe he had to make some tough calls to protect the village from those who might want to use the Kyuubi for evil.
Well, it depends on the specific fanfic. Some fanfics might really emphasize Naruto's growth to be on par with Minato in terms of smarts. They could show Naruto learning from Minato's memories or having some sort of spiritual connection that transfers knowledge. However, other fanfics might focus more on other aspects of Naruto's character and not necessarily make him as smart as Minato.