Perhaps the fanfiction could revolve around Naruto time - traveling to the world where Ryu Hayabusa exists. There, he witnesses Ryu's battles and is in awe of his strength and honor. Naruto then decides to train under Ryu to become stronger. During this training, Naruto has to adapt to a different style of combat without his usual ninja tools. He learns to rely more on his body and speed, like Ryu. This experience changes Naruto's perspective on fighting and when he returns to his own world, he brings back a new sense of confidence and fighting ability.
One possible plot could be that they team up to fight a common enemy. Maybe a powerful and ancient evil has emerged, and their combined skills are needed to defeat it. Along the way, they learn to trust and respect each other more deeply.
In this kind of fanfiction, Naruto might learn new fighting techniques from Ryu Hayabusa. Ryu is known for his ninja skills in his own universe, so he could train Naruto in a different way compared to what Naruto is used to in the original Naruto world.
Another possibility is that some of the more power - hungry ninja from Naruto's own world might become antagonists. They could be jealous of Naruto's new connection with Ryu Hayabusa and the potential power and knowledge he could gain from it. These ninja might try to undermine Naruto or even try to harm Ryu to prevent Naruto from getting stronger. Maybe some of the rogue ninja or the hidden enemies within the ninja villages would see this as an opportunity to make a move against Naruto.
Link from The Legend of Zelda series could be a great partner for Ryu Hayabusa. Link has his trusty sword and shield, and his ability to solve puzzles and traverse different terrains. Ryu Hayabusa's ninja skills would blend well with Link's adventuring spirit. They could be on a quest to rescue Zelda, who has been kidnapped by some dark force that also threatens Ryu Hayabusa's homeland. Their combined skills would make for an exciting story as they face various enemies and challenges along the way.
Naruto might become more serious about combat. Ryu Hayabusa is known for his intense focus in battle, and Naruto could adopt this trait. Instead of his sometimes impulsive fighting style, he would be more calculated, thinking several steps ahead like Ryu.
One idea could be a crossover with a popular RPG like Final Fantasy. Ryu Hayabusa could be transported to the world of Final Fantasy and team up with the main characters to fight a common enemy. He could bring his ninja skills and unique weapons to the table, adding an interesting dynamic to the battles and the story.
Training and growth is also a theme. The reader may start as a novice in the world of ninjas or martial arts, and Ryu Hayabusa becomes their mentor. Through his guidance, they grow in strength and skill. Additionally, themes of loyalty and friendship can be found. The reader and Ryu Hayabusa form a bond that is tested in various ways, such as when facing betrayal from within their own group or when up against a powerful enemy.
In the fanfiction, it could be that Hanzo is seen as a symbol of the past that Naruto wants to revive. Naruto, with his optimistic and determined nature, tries to bring back the glory days associated with Hanzo. He might form a team dedicated to researching and implementing the forgotten arts of Hanzo. This could lead to a series of adventures where they face opposition from those who want to keep the past buried, but Naruto persists, believing that Hanzo's legacy can make the ninja world a better place.
One possible plotline could be that an enemy uses a powerful genjutsu to brainwash Naruto. He then starts to act against his friends and the Hidden Leaf Village. For example, he might divulge village secrets or attack his comrades without realizing it.
One possible plotline could be Naruto trying to understand Pein's ideology. He might start to study the reasons behind Pein's actions in the Akatsuki. For example, Naruto could explore Pein's concept of peace through pain. He might try to find common ground between his own beliefs of peace and Pein's, which would lead to some intense internal and external conflicts within the story.