Good spn crossover fanfics usually have an engaging plot. It can't just be a simple mash - up. There needs to be a real conflict or goal. Maybe the spn characters have to enter another show's world to stop a new kind of evil that is threatening both universes. And the writing style should be engaging, not too difficult to read but also not too simplistic.
A great spn crossover fanfic often has well - blended universes. For example, if it's a crossover with Harry Potter, it should seamlessly integrate the magic of Hogwarts into the spn world. The characters from both should also be in - character. If Sam and Dean meet Harry, they should react in ways that are true to their personalities.
I think a key factor is the character development. If the doctor undergoes significant changes or growth as they encounter the spn universe, that can make for a compelling story. Plus, creative use of the settings and conflicts from both the medical and supernatural aspects can draw readers in.
Sure. 'Supernatural and Sherlock' is an interesting spn crossover fanfic. It combines the mystery-solving elements of Sherlock with the supernatural world of Supernatural in a really engaging way.
A really interesting plot could involve the Tesseract from the Avengers. It could be that the Tesseract has some sort of connection to the Darkness in SPN. When the Avengers are trying to protect the Tesseract, they accidentally release some of the Darkness. The Winchesters, with their knowledge of the supernatural, and the Avengers, with their superpowers, must then join forces to contain the Darkness again. The characters could also have some really fun interactions, like Dean being in awe of Iron Man's technology and Steve Rogers being impressed with Sam and Dean's hunting skills.
A great witch crossover fanfic often has unique characterizations. The witches should have distinct personalities, powers, and backstories. For example, a witch from a Celtic background might have different magic compared to one from a Nordic tradition. Also, a good plot is essential. It could involve the witches solving a mystery that spans across different fictional worlds or dealing with a powerful enemy that threatens all the crossovers. Good world - building is another characteristic. It needs to create believable and interesting settings where the crossovers take place.
Sam Winchester and Bruce Banner would be an amazing pairing. Sam is highly intelligent and well - read, and Bruce is a brilliant scientist. They could bond over their knowledge and maybe even find a way to control the Hulk better. Also, Natasha Romanoff and Charlie Bradbury would be a cool pair. They're both strong, independent women with a lot of skills. Natasha could teach Charlie some combat moves, and Charlie could introduce Natasha to some cool geeky stuff like LARPing.
A cool concept would be a joint mission. The Supernatural side has to deal with a powerful, ancient evil that has some connection to the vampire origin in the TVD world. So, they team up. Dean might be initially hesitant about working with vampires like Stefan and Damon, but they soon realize they need each other's skills to defeat this new threat.
In the 'amara's daughter spn fanfic', it might be centered around the origin of the daughter. Is she a product of some sort of supernatural event? It could also deal with her growth and development. She may start as an innocent character but as the story progresses, she discovers more about her powers and her place in the world. There could be elements of mystery, like who her father is, if it's not already known, and how that affects her identity. The fanfic could also introduce new enemies or allies for her, all while being set in the 'Supernatural' universe.
Well, 'childish things spn fanfic' is special because it can explore the characters in a more light - hearted way. In normal Supernatural episodes, they face so much danger and darkness. But in these fanfics, they can have fun like normal people. They might play silly games or have a friendly competition, which is a refreshing change from the usual intense plotlines.
The key is to find common ground. For example, both shows deal with the supernatural. So, a plot where a powerful supernatural entity threatens both the world of Supernatural and Mystic Falls would bring the characters together. Sam's knowledge of lore could combine with Bonnie's magic skills to fight this entity.
A great 'rottmnt crossover fanfic' has well - written characters. It should stay true to the original personalities of the 'rottmnt' characters while also adapting them to fit into the new crossover universe. For example, if they cross over with a magical world, their reactions and how they use their skills should be believable.