It could have the Doctor showing up in the Upside Down to help solve the mysteries. Maybe Eleven uses her powers to assist the Doctor in some time-travel adventures.
Well, one possibility is that the Doctor arrives in Hawkins during one of the monster attacks and teams up with the kids to fight off the threat. Another could be that a time rift brings characters from Stranger Things to the Doctor's universe, and they have to find a way back.
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.
In a Stranger Things and H20 crossover fanfiction with Steve, he could have a unique role. Imagine Steve trying to adapt to the beachy, water - filled world of H20. He might start off as the outsider who doesn't understand the whole mermaid secret. However, as the story progresses, his skills in handling strange situations from Stranger Things would help him. For example, he could use his combat skills against any threats that come from the combination of the two universes, whether it's a demogorgon - like creature in the water or some evil mermaid - related plot.
The plot could involve a new, super - powerful entity that is a combination of the Upside Down's dark forces and a kaiju - like being. This entity starts to wreak havoc in both Godzilla's world and Hawkins. The Stranger Things kids find a way to call Godzilla for help, and Godzilla arrives just in time to face this new threat. As they fight together, they learn about each other's strengths and weaknesses. Eleven uses her powers to enhance Godzilla's attacks, while Godzilla's presence scares off some of the smaller Upside Down creatures, giving the kids a chance to regroup and plan their next move.
One idea could be that the Demogorgon from Stranger Things somehow finds its way into the wizarding world of Harry Potter. The Hogwarts students would be both terrified and intrigued. They might initially try to use magic spells like Stupefy or Protego to fend it off. Hermione would probably be the first to start researching about this strange new creature, while Harry and Ron would be more on the front lines, trying to keep their classmates safe. The Stranger Things kids could also be magically transported to Hogwarts. Dustin would be amazed by all the magical creatures and would want to study them, Eleven might use her powers in new and unexpected ways in the wizarding world, like trying to communicate with magical portraits or using her telekinesis to move magic wands.
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.
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.
A Stranger Things and Avengers crossover fanfiction could be filled with lots of interesting storylines. The Upside Down could be a new threat that the Avengers have to face. Steve Rogers could lead the Hawkins kids, teaching them about strategy and combat. Meanwhile, characters like Thor could be intrigued by the strange creatures from the Upside Down. The different powers and personalities of the two universes would create a really engaging and unique story.
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.