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.
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 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 scenario could be that the Legends accidentally land in a Doctor Who universe and have to team up with the Doctor to get back home. Another could be that a powerful force is threatening both timelines, forcing them to collaborate.
The possibilities are endless! Maybe the Doctor could time-travel to a moment where the Legends are facing a temporal crisis and offer his unique skills to help.
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.
One great example could be a story where the characters from Stranger Things encounter Pennywise from IT. Maybe Eleven uses her powers to combat Pennywise's illusions. Another example might involve the Losers' Club from IT helping the kids in Stranger Things to fight the Upside - down monsters. There could also be a fanfic where the two groups get trapped in a shared nightmare - like dimension created by the combined evil of the Mind Flayer and Pennywise.
They could meet during a time-traveling adventure gone wrong, getting stranded in the same era.
It could involve some sort of time anomaly or magical interference causing the pregnancy. Maybe it's a result of a unique encounter with a powerful alien species.