Perhaps in a fanfiction, Naruto visits Dean's world. He'd be fascinated by all the modern technology and different types of monsters. Dean would have to protect Naruto from the more dangerous aspects of his world, and together they could come up with unique ways to deal with threats using both ninja and hunter strategies.
There might be a fanfiction where Dean somehow gets transported to the Naruto universe. He could start learning chakra control from Naruto and they form a strong friendship while Dean also tries to find a way back to his own world. It would be full of cultural clashes and exciting adventures as Dean tries to adapt to the ninja lifestyle.
You can try websites like Fanfiction.net or Archive of Our Own (AO3). These platforms have a large collection of fanfictions on various topics, so there's a good chance you'll find dean meets naruto fanfiction there.
One great 'naruto meets naruto fanfiction' is 'Naruto: Double Trouble'. In this story, the two Narutos from different timelines meet and have to work together to face a new and powerful enemy. Their combined skills and the way they interact with each other, like arguing over who has the better Rasengan technique, makes for an exciting read.
Another plot could involve Female Naruto being a ninja from a hidden village that was thought to be extinct. She meets Naruto while on a mission to seek help. Naruto is intrigued by her and they end up going on a journey together to revive her village, facing many challenges and enemies on the way.
A really cool plot could be that Gohan and Naruto get transported to an alternate dimension where they have to find a way back home. Along the way, they meet different versions of their friends and foes, and they have to work together to overcome the challenges of this strange new world. They might also discover some secrets about their own powers and the nature of their universes in the process.
One interesting storyline could be the characters from Naruto and Bleach teaming up to fight a common, powerful enemy that is a threat to both their worlds. For example, Naruto and Ichigo might combine their unique powers to take on a villain that has the ability to disrupt the balance of souls and chakra.
Perhaps a plot where Vegeta and Naruto have to team up against a common enemy from Vegeta's universe and Naruto's world combined. They would have to combine their unique powers like Naruto's Rasengan and Vegeta's Galick Gun. This would involve a lot of strategizing and learning about each other's abilities.
In 'naruto meets itachi fanfiction', there could be a scenario where Itachi is brought back to life by some powerful jutsu. Naruto then has to deal with the complex emotions of seeing Itachi again. They could start a journey together to right some of the wrongs that Itachi felt he had committed. Itachi might also help Naruto unlock a new form of his power, like a more advanced version of the Nine - Tails mode.
There might be a fanfiction where Rory and Dean's baby has some special talent or gift that they discover as the baby grows. This could lead to a series of heartwarming and sometimes comical events as they try to understand and nurture it. For example, the baby might have an extraordinary love for books at a very young age, just like Rory, and they explore how to encourage that.
In some fanfictions, Dean kidnaps Cas because he has been influenced by a powerful and dark force. This leads to a complex relationship dynamic where Cas has to figure out how to break the spell on Dean while being held captive. It often involves a lot of emotional turmoil and some intense scenes of Cas trying to reach the real Dean inside.
There could be a fanfiction where Dean's pregnancy is a result of some sort of supernatural curse. In this story, he has to find a way to break the curse while dealing with the pregnancy. This might involve seeking out a powerful witch or an ancient artifact. Along the way, he discovers new things about himself and his relationships, especially with Castiel who might offer some angelic help or at least moral support.