Naruto and Sasuke are definitely popular. Their rivalry is iconic in the Naruto series, and it would be exciting to see them face off in an arena. Sakura is also a common choice as she has her own set of skills. Kakashi too, with his Sharingan and vast array of jutsus. And of course, Rock Lee, with his amazing taijutsu skills. His unique fighting style can make for some really intense arena battles.
One idea could be a tournament where characters from different villages and generations compete. For example, Naruto's son could face off against Sasuke's daughter. Another could be a team - based arena fight where the teams have to strategize and use unique jutsus to win. Maybe a fight in an ancient, forgotten arena filled with dangerous traps that the fighters have to avoid while battling each other.
One common theme is the struggle for power. Naruto has to push himself to the limits to become a brutal fighter, often facing stronger opponents. Another theme is self - discovery. As he becomes more brutal in his fighting, he also discovers new aspects of himself.
Well, Naruto is definitely one of the main characters since it's in the title. He would be the central fighter. Sakura might also be a main character, perhaps as Naruto's support or even as a fighter herself, using her medical ninjutsu in combat in new and creative ways.
One possible plot could be Naruto using his ninja skills in the context of flying. Maybe he has to use his quick reflexes to dodge enemy fire while in the air. His ability to sense danger could be translated into anticipating enemy attacks during aerial battles.
Maybe Naruto is transported into the Street Fighter world. He could use his ninja skills in the Street Fighter battles, like using his shadow clones to confuse opponents. And perhaps he teams up with some of the Street Fighter characters to fight against a common enemy.
I'm not sure about a specific 'Naruto is a Street Fighter' fanfiction to recommend. You could try searching on fanfiction websites like FanFiction.net or Archive of Our Own. They usually have a wide variety of fan - made stories.
One idea could be to create a story where Naruto discovers a new and powerful fighting style from an ancient scroll. Another could be a fanfiction about a tournament among all the ninja in the Naruto universe, with unique rules and unexpected alliances. Or perhaps a story where Naruto has to fight an enemy who can copy his every move and he has to find a way to outwit them.
One common theme is the clash of different fighting styles. The ninjutsu of Naruto characters and the martial arts of Street Fighter characters create really cool battle scenes. For example, Sasuke's lightning - based attacks against Chun - Li's lightning - fast kicks.
Sasuke could be one of his allies. Sasuke's natural combat skills and his sharingan would make him a great asset in aerial battles. He could quickly analyze the enemy's movements and strategies.