In a Stranger Things and Riverdale crossover fanfiction, there are so many possibilities. The gangs from both shows could team up against a common enemy. Let's say a new evil entity that combines the characteristics of the Demogorgon and the Black Hood. The friendships and romances in the story could be completely reshuffled. Steve might have a fling with one of the Riverdale girls, or Nancy could become friends with Betty. And the settings could blend together, with scenes taking place in both Hawkins and Riverdale, creating a really engaging and unique story.
In a Riverdale and Stranger Things crossover fanfiction, Betty could use her investigative skills along with Nancy Wheeler's. The two of them could be the driving force in uncovering a new threat that is a blend of the strange happenings in both their worlds. The Riverdale characters would have to adapt to the strange and dangerous environment of Hawkins, while the Stranger Things characters might be intrigued by the soap - opera - like drama that exists in Riverdale.
Betty and Eleven would make an interesting pair. Betty has her own dark secrets and determination in Riverdale, and Eleven has her powers and a past full of mystery in Stranger Things. They could help each other out in different ways, like Betty helping Eleven understand normal human relationships, and Eleven using her powers to protect Betty when she's in danger.
Cheryl Blossom and Max Mayfield would be a fiery combination. Cheryl is confident and a bit of a diva in Riverdale, and Max is a tough and independent girl in Stranger Things. They could either become great friends or bitter rivals. If they were friends, they could combine their strengths to take on the challenges in both towns. If they were rivals, it could create a lot of drama as they compete in different areas, like popularity or solving mysteries.
One great Stranger Things crossover fanfiction is the one that combines it with 'Harry Potter'. It imagines the characters from Stranger Things attending Hogwarts. The way the Upside Down is incorporated into the magical world is really interesting. It adds a new layer of mystery and danger.
In a world where Hawkins and the kaiju realm collide, Godzilla emerges in the Upside Down. Eleven senses his presence and is both terrified and intrigued. The Demogorgons try to attack Godzilla, but his atomic breath incinerates them. Meanwhile, the kids of Hawkins are in awe as they watch this giant creature fight their otherworldly enemies. Godzilla becomes an unexpected ally in their fight against the darkness of the Upside Down.
Another great concept is a crossover where Eleven's powers are mistaken for some kind of witchcraft by the Supernatural universe. Sam and Dean initially think she's a threat but then realize she's actually a powerful ally against a common enemy. They could be facing a powerful being that can manipulate time and space, and Eleven's telekinetic and telepathic abilities are crucial in defeating it.
To write a good Stranger Things crossover fanfiction, you should also focus on the relationships between the characters. How would Eleven interact with Luke Skywalker? What kind of friendship would form between Dustin and a character from 'The X - Files'? Building these relationships can make the crossover feel more natural and engaging for the readers.
One idea could be that the Demogorgon from Stranger Things somehow ends up in Derry from It. The Losers' Club and the kids from Hawkins could team up to fight it. They would have to combine their different skills and knowledge of the supernatural.
One idea could be that the Losers' Club from 'It' somehow ends up in Hawkins, Indiana, during the events of 'Stranger Things'. They could team up with the kids from 'Stranger Things' to fight a new, combined threat that has elements of both the Upside Down monsters and Pennywise's terrors. For example, the Mind Flayer could merge with Pennywise in some way, creating an even more terrifying entity.