One idea could be an Agent 47 crossover with the Hitman universe's other assassins. They could team up or compete in a high - stakes mission. Another is a crossover with a detective character from a crime - solving series. The detective could be on Agent 47's trail, leading to a cat - and - mouse chase. Or a crossover with a science - fiction character where Agent 47 has to deal with otherworldly threats in an unfamiliar setting.
Well, a great Agent 47 crossover fanfiction idea might be with a superhero. Imagine Agent 47 being hired to take out a villain that the superhero is also after. It would create an interesting dynamic of stealth versus superpowers. Also, a crossover with a post - apocalyptic survivor character could be cool. Agent 47 would have to adapt his skills to the new, harsh environment while the survivor might see him as a threat or an ally. Then there's the idea of crossing over with a time - traveling character. Agent 47 could get caught up in a time - warping adventure.
An Agent 47 crossover fanfiction could involve him crossing paths with a magical character from a fantasy world. Maybe he's sent to assassinate a powerful wizard, but the wizard's magic throws him off his game. Another possibility is a crossover with a video game character from a different stealth genre. They could compare notes on their stealth techniques. And a crossover with a character from a political thriller could add a layer of intrigue, with Agent 47 getting involved in a web of international politics and conspiracy.
One idea could be a crossover with the Avengers. Agent Carter could be brought into the modern day through some time - travel mishap and have to work with the Avengers to stop a new threat. Maybe she'd use her old - school spy skills and charm to get the team in line.
One idea could be a crossover with another kids' show like 'Dora the Explorer'. Special Agent Oso could team up with Dora to solve a mystery that involves both their worlds, like a missing map piece that leads to a special place. They could use Oso's gadgets and Dora's bilingual skills to overcome obstacles.
Another plot could be a time - travel story. Agent Washington and Agent Texas are sent back in time to a crucial moment in their organization's history. They have to make sure that certain events happen as they should without changing too much of the future. This would involve a lot of sneaking around, gathering intelligence, and dealing with historical figures within their universe.
One interesting idea could be a crossover with "Moana". Elsa's ice powers and Moana's connection to the ocean could create a really cool dynamic. Maybe Elsa accidentally freezes part of Moana's ocean and they have to work together to fix it. Another could be with "Tangled". Rapunzel's long hair and her adventurous spirit combined with Elsa and Anna's journey in Frozen 2 would be exciting. Rapunzel could use her hair to help them climb mountains or cross chasms. A third idea is a crossover with "Beauty and the Beast". Belle's love for books and knowledge could help Elsa understand more about her powers and the history of magic in the Frozen world.
A more complex plot could be a crossover where an evil organization is trying to take over both universes. Naruto and Agent 47 have to find a way to work together, despite their very different backgrounds and methods. They could learn from each other's strengths and overcome their differences to save both their worlds.
A Rambo crossover fanfiction could involve him crossing over into the Star Wars universe. Rambo's guerilla warfare tactics could be interesting in a galaxy far, far away. Maybe he helps the Rebel Alliance in a ground - based battle against the Empire. Or a crossover with the Predator series. Rambo would be a worthy opponent for the Predator, and the fight between them in the jungle could be epic. Also, a Rambo and John Wick crossover would be intense, two highly skilled fighters on the same side or perhaps initially at odds.
One idea could be a crossover with a modern military setting. The Decepticons could be trying to steal advanced military technology. Another is a crossover with a post - apocalyptic world where they are competing with other factions for resources. A third could be a crossover with a magical realm, with the Decepticons trying to harness the magic for their own evil purposes.
One idea could be a crossover with Naruto. Kakuzu could be sent to the Naruto universe and form an unlikely alliance with a shinobi village to fight a common enemy, like the Akatsuki from his own world turned rogue in the new universe. This would create a lot of interesting character dynamics and battles.
Another option is a crossover with 'The Little Mermaid'. The characters from the descendants could meet Ariel and her friends underwater. Evie might be interested in the mermaid fashion and could design new outfits inspired by the underwater world.
Another possibility is a crossover with the world of Naruto. The characters from MHA could participate in the Chunin Exams. Bakugo might be really into showing off his skills in this new and different kind of competition.