Another plot twist might be a time - related one. What if John gets transported back in time to the events of the Harry Potter series and meets a younger Hermione? His different perspective and knowledge from his own world could change the course of events in the wizarding world, creating a complex web of changes and consequences.
Hermione is from a world full of magic and mystery, while John has his own experiences in his world. When they come together in the crossover, their different backgrounds create an interesting dynamic. Hermione can introduce John to the wonders of magic, like flying on broomsticks or using magic wands. John can share his own cultural or technological knowledge (if applicable in his world) with Hermione, opening her eyes to new ideas. This exchange of knowledge and experiences makes their relationship in the fanfiction more engaging and their characters more complementary.
Hermione would likely become more hardened. In the world of The 100, she'd face life - or - death situations regularly. This would make her more decisive and perhaps a bit more ruthless when necessary. But she'd also bring her compassion. She might start to see the value in the different cultures in The 100, like the Grounders' connection to nature, and incorporate that into her own view of the world.
There's a fanfiction where John Constantine crosses over with the Supernatural universe. It's really cool because it combines the dark magic and demon - hunting aspects of both worlds. Constantine's knowledge of the occult clashes and also meshes with the Winchesters' way of dealing with the supernatural, leading to some intense and exciting storylines.
In fanfiction, Hermione could find herself in a situation where she has to deal with the One Ring. Given her strong will, she might be able to resist its power for a longer time than most. However, she would also be aware of the danger it poses and try to find a way to destroy it, perhaps using a combination of her magic and the knowledge of the lore in Middle - earth.
One possible fanfiction could be about Hermione using her magic to help Bruce Banner control the Hulk. Maybe she creates a spell that can soothe the Hulk's rage, allowing Bruce to have more control over his transformations.
Hermione is a very cerebral character. She thinks deeply about things, plans ahead, and is guided by her strong sense of right and wrong. John Wick, in contrast, is a man of action. He's driven by revenge and has a set of skills that are more physical and combat - oriented. In a fanfiction, Hermione's inquisitive nature might initially annoy John Wick, who is used to working alone and in silence. However, as they get to know each other, he would come to appreciate her intelligence and the fact that she can use magic to get them out of tight spots. Hermione, for her part, would be intrigued by John Wick's single - minded determination and his ability to stay calm in the face of danger. She would also be interested in learning his combat skills to add to her own self - defense repertoire.
One interesting crossover could be Hermione using her magic to help John Wick in a particularly difficult mission. Maybe she could use a spell to disorient his enemies while he takes them out with his combat skills. Another could be John Wick protecting Hermione as she tries to retrieve a powerful magical artifact from a dangerous place filled with muggle threats.
Action sequences are a very popular element. Fans love to see how John Wick's unique combat style meshes with other characters in crossover fics. Another popular element is the exploration of different universes. For example, when he crosses into a science - fiction world, how he adapts to new technologies and rules.
John Wick could be brought into the Avengers' universe through a multiverse - type situation. Maybe a villain's experiment goes wrong and opens portals that pull in characters from different realities, including John Wick. Once there, he'd quickly assess the situation. Given his no - nonsense attitude, he'd probably start taking action against the common enemy right away, without waiting for the Avengers to fully understand his motives.