A third plot idea is a crossover with the 'Final Fantasy' universe. Ryu could be transported to a world filled with magic and monsters. He would have to team up with the Final Fantasy characters to fight against a common enemy, perhaps using his Hadouken in combination with magic spells.
One idea could be a story where Ryu and Chun - Li are forced to team up for an underground fighting tournament that has a mysterious organizer. They start off not getting along well because of their different fighting styles and philosophies. But as they face tougher opponents together, they begin to respect each other more and learn from one another.
One idea could be Poison joining the Street Fighter tournament to prove herself. She might face off against some of the well - known Street Fighter characters like Ryu or Chun - Li. Another plot could involve Poison teaming up with a Street Fighter character, say Ken, to take on a common enemy that threatens both their worlds.
One idea could be a crossover between Street Fighter and a popular anime like Naruto. Imagine Ryu training with Naruto to master new forms of energy control. Another could be a crossover with the DC Universe, where characters like Chun - Li team up with Wonder Woman to fight a common enemy. Or perhaps a crossover with the world of Final Fantasy, with Street Fighter characters embarking on a magical quest in a fantasy realm.
Luffy from 'One Piece' could also be an interesting crossover. Luffy's stretchy abilities combined with Ryu's martial arts would make for some unique fight scenes. They could also learn from each other's determination and loyalty to their friends.
A fanfiction could focus on a friendly rivalry between Ryu and Sakura. They might compete in local street fighter tournaments. Sakura is always eager to prove herself against the more experienced Ryu. And in the process, they both learn respect for each other's fighting styles.
One idea could be that Naruto characters are transported to the Street Fighter universe and have to learn the fighting styles there. For example, Naruto might be intrigued by Ryu's Hadoken and try to incorporate it into his own Rasengan. Another could be a tournament where both Naruto and Street Fighter characters compete. Sakura could face off against Chun - Li, with Sakura using her medical ninjutsu in unique ways during the fight.
One idea could be to have Ruby Rose learn new combat moves from a Street Fighter character like Ryu. She could incorporate his hadouken - like move into her scythe attacks, creating a unique and powerful fighting style.
One idea could be a crossover tournament where Naruto characters like Naruto, Sasuke, and Sakura enter the Street Fighter universe to compete. They could learn new fighting styles from the Street Fighter characters and form unique friendships or rivalries.
One idea could be creating an OC who is a long - lost relative of an existing character, like a cousin of Ryu. This OC could have a unique fighting style that combines elements of Ryu's Hadoken but with a different twist, like a lightning - infused version. Another idea is an OC from a different dimension who comes to the Street Fighter world to learn their fighting techniques. They could start off as a bit of an outcast but gradually gain the respect of the other fighters.
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.