Well, a fanfiction could focus on a character from Naruto, like Sakura, being sent to Riverdale for some kind of training mission. She might interact with Betty and Veronica, and perhaps teach them some self - defense techniques. Or there could be a story where Jughead discovers the world of ninjas through a strange portal and teams up with Naruto to fight against a common enemy that threatens both their worlds.
A different approach could be a crossover of the families in both universes. Maybe the Uzumaki family has some connection to one of the Riverdale families in the past. This could lead to a story where Naruto has to come to Riverdale to uncover the secrets of his family's connection. Along the way, he befriends the core group in Riverdale and they all work together to solve this mystery that spans two very different worlds.
A plot idea could be that the villains from Naruto, like Orochimaru, somehow end up in Riverdale and start causing chaos. The Riverdale gang has to team up with Naruto and his friends to stop Orochimaru's evil plans. Another idea is that the Riverdale characters gain some ninja abilities and use them to solve their own town - related problems.
One idea could be creating an OC who is a new student at Riverdale High. This OC could have a mysterious past that slowly unfolds throughout the story, like being related to an old Riverdale family no one knew about. They could get involved in the drama between the Bulldogs and the Southside Serpents, trying to bring peace. Another idea is an OC who is a journalist for the school paper, uncovering secrets that even Jughead hasn't found yet.
Well, perhaps it's a case of mistaken identity. A new character in Riverdale is kidnapped instead of the intended target, who was thought to be Archie because of his popularity. This could lead to a series of events where the other characters have to race against time to find the kidnapped person before it's too late. They might discover new secrets about the town and its inhabitants during the search.
Well, you could do a Riverdale fanfic that focuses on the friendship between Betty and Kevin. What if they had a secret adventure together that no one else knew about? Or a story where Archie gets involved in a music competition outside of Riverdale and has to deal with new rivals. Also, a fanfic about the Blossom family secrets being revealed in a different way than in the show could be really interesting.
One idea could be that a vampire from TVD ends up in Riverdale. Maybe Damon Salvatore finds himself in the small town for some mysterious reason. He could get involved with the mystery-solving that the Riverdale gang is always up to. He might use his vampire charm and powers to help or sometimes complicate things. Another plot could be that a character from Riverdale discovers the existence of vampires and werewolves like in TVD. For example, Jughead could be intrigued by these supernatural beings and start writing a story about them, which then draws the attention of the TVD characters.
One idea could be that a strange meta - human from The Flash's world somehow ends up in Riverdale. This meta - human has the power to manipulate memories, and starts causing chaos by making the Riverdale characters forget important things about each other. Archie and his friends then team up with Barry Allen to stop this meta - human before their town is torn apart.
One idea could be a male oc who is a new student in Riverdale. He has a mysterious past related to a big city crime syndicate. As he tries to fit in at Riverdale High, he gets involved with the core group of friends. Maybe he has some special skills like being an expert in martial arts or a whiz at hacking, which he uses to help solve the town's mysteries. Another plot could be that he is an aspiring musician who gets caught up in the drama between the music clubs at school and the local music scene in Riverdale. He could also have a romantic sub - plot with one of the female characters, like Betty or Veronica, but there are obstacles in their relationship due to his secrets.
Some interesting ideas for Riverdale fan fiction could be a crossover with another popular teen drama. Imagine the characters of Riverdale meeting the characters from 'Stranger Things'. It would be really cool to see how they interact. You could also write a fan fiction that focuses on the future of Riverdale. What will happen to the town and its residents ten years from now? Will Archie still be in town? How will Veronica's business empire develop?
In some 'Riverdale Crossover Fanfiction', a crossover with a time - travel plot is really engaging. For example, when the Riverdale gang travels back in time to the 1950s and has to deal with the different social norms while also trying to get back to their own time. Also, crossovers with other teen drama shows where they have to compete in a singing or dancing competition together can be quite entertaining.