A cool plot might involve the teams from Kuroko no Basket being transported to the Naruto universe. There, they have to participate in a special tournament where they not only play basketball but also face the challenges of the ninja world, like dealing with rogue ninjas trying to disrupt the games. And the Naruto characters could be intrigued by this new sport and start to learn it themselves, leading to some interesting cultural exchanges between the two universes.
I think Naruto and Kuroko would be an interesting pairing. Naruto's exuberant and determined personality would contrast with Kuroko's quiet and mysterious nature. They could learn a lot from each other. Naruto could teach Kuroko about believing in oneself no matter what, and Kuroko could show Naruto the power of strategy and subtlety in achieving goals, which could be applied both in basketball and in Naruto's ninja battles.
A crossover with 'Slam Dunk' would also be great. Maybe the teams in Kuroko no Basket meet the Slam Dunk characters in a streetball tournament. There could be intense rivalries and exchanges of basketball techniques. For example, the flashy moves of the Slam Dunk players could inspire the Kuroko no Basket characters to add some new elements to their own game.
A plot could revolve around a time - travel situation. Some of the characters from Kuroko no Basket are sent to the world of Haikyuu and vice versa. The basketball players are suddenly thrust into the world of volleyball and have to adapt quickly. They end up forming a combined team with the volleyball players to compete in a special event that is designed to test the limits of their skills and teamwork.
How about a story where the coaches of both series team up? Ukai and Aida could collaborate with Kuroko no Basket's coaches. They could create a super - training regime for a combined team of players from both series. This would lead to some great character interactions as the players with different sports backgrounds try to work together and overcome challenges.
Kuroko himself would be very interesting. His unique 'phantom' style of playing basketball could create some really unexpected scenarios in a crossover. For example, if he were in a crossover with a detective story, his ability to be unnoticed could be used to solve mysteries in a very unorthodox way while still having some basketball - themed elements in the story.
One great Akashi x Kuroko fanfiction is 'The Red and the Blue'. It beautifully delves into their relationship, showing how Akashi's dominant personality and Kuroko's calm nature complement each other. The author does an excellent job of portraying their emotions in a Yaoi context.
One idea could be a crossover with 'Haikyuu!!'. The characters from Kuroko no Basket could participate in a volleyball match against the Haikyuu!! teams. It would be fun to see how their basketball skills translate to volleyball.
Kagami Taiga is also a favorite. His strong and passionate nature can create great dynamics in crossover stories, especially when paired with more laid - back characters from other franchises.
I think Hinata and Kuroko would make an interesting pairing. Hinata's energetic and explosive nature on the volleyball court combined with Kuroko's calm and almost invisible presence on the basketball court could lead to some really unique interactions. They could learn from each other's determination and drive.