You could have a story where Naruto is on a mission in a forest that is actually a portal to a Creepypasta realm. He meets characters like Jeff the Killer there. Naruto, being Naruto, tries to understand why Jeff is the way he is and offers to help him change. This could lead to a lot of internal conflict for Jeff as he is faced with Naruto's kindness and his own dark past. Also, Naruto could use his shadow clone jutsu in creative ways to deal with the various threats in the Creepypasta world.
One idea could be a crossover between Slenderman and Jeff the Killer. They could team up to terrorize a small town in a way that combines their unique horror elements. For example, Slenderman could use his mind - controlling abilities to create chaos while Jeff the Killer goes on his bloody rampage.
One idea could be that the reader is a new resident in a town known for strange disappearances. Eyeless Jack starts to lurk around the reader's house, leaving small, disturbing signs. Eventually, the reader discovers Jack's lair while exploring an abandoned building. Another could be that the reader is a doctor or nurse, and Eyeless Jack, in his strange way, becomes attracted to the reader's medical knowledge and calmness during dangerous situations.
There's a Naruto creepypasta fanfiction that focuses on a hidden part of the Uzumaki clan's history. It reveals a dark secret that was meant to be buried forever. In this story, the main characters start to experience strange phenomena related to this secret. For example, they might see strange markings on the walls of old Uzumaki clan buildings that seem to have a life of their own. This story builds on the mystery and power associated with the Uzumaki clan in the Naruto universe.
One possible plot could be Naruto finding himself in a strange, alternate dimension where he encounters various Creepypasta characters. As he tries to find his way back home, some of these Creepypasta characters develop an attraction to him, creating a harem situation. For example, Jeff the Killer might see Naruto's strength and be intrigued, while other characters like Sally could be drawn to his kind heart. Naruto would have to navigate these new relationships while also dealing with the dangers of this new world.
One idea could be to have Spider - Man encounter the Slenderman. Picture Spider - Man swinging through the city and suddenly coming across the tall, faceless figure in an alley. Another could be Loki causing chaos in a Creepypasta - like town, using his magic to create creepy illusions. Maybe the Avengers have to deal with Jeff the Killer, who somehow gets superpowers and becomes an even more dangerous threat.
A more character - driven idea would be that Naruto and Yato meet and learn from each other's outlooks on life. Naruto, who has always fought for his friends and village, could teach Yato about the importance of having a strong community. Yato, who has a very different view of the afterlife and the divine, could show Naruto a whole new perspective on existence.
One interesting idea could be Orochimaru seeing Naruto as a unique specimen and instead of just trying to use him, he actually starts to respect Naruto's willpower. This could lead to a strange mentorship of sorts where Orochimaru teaches Naruto some of his more unorthodox jutsu in exchange for Naruto trying to help Orochimaru find a new path that doesn't involve so much darkness.
One idea could be a story where Naruto and Tsume go on a mission together in an unknown territory. They face various challenges and have to rely on each other's skills. Naruto's optimism might contrast with Tsume's more serious nature, creating an interesting dynamic.
Another idea is that Bayonetta somehow ends up in the Naruto universe. She might be mistaken for a powerful ninja at first. Then she could start teaching some of the ninja new combat techniques inspired by her own moves, while also learning about chakra and how it differs from her own power source.
Well, a cool concept could be that Naruto discovers Sarada has a unique power that is similar to his own but also very different. He then decides to mentor her privately, and during this process, they form a strong bond that is not just about master - student but also a deep friendship. They could also face some challenges from the village elders who are skeptical about their relationship.