A more unique crossover could be with a period - piece like 'Pride and Prejudice'. The U.N.C.L.E. agents are sent back in time to Regency England. They have to blend in while also trying to complete their mission. This could lead to some humorous situations as they interact with the characters from 'Pride and Prejudice' in their formal and proper society.
Another plot could involve a crossover with the 'Mission: Impossible' series. The IMF team and the U.N.C.L.E. agents could find themselves in a race against time to stop a powerful weapon from being launched. There could be a lot of high - octane action scenes and tense spy - vs - spy moments as they try to figure out who is on their side.
One plot idea could be that the NCIS team is investigating a case that has international implications, and they cross paths with the agents from Man from Uncle. Maybe there's a high - tech weapon being smuggled that both teams are after. Another idea is a character - centric plot where an NCIS agent has a past connection to one of the Man from Uncle agents, and they have to work together despite their differences.
One idea could be a crossover where the Ravenschild character teams up with the main characters from 'Man from Uncle' to solve a mystery that spans different continents. Maybe it involves a stolen ancient artifact that has some sort of technological secret within it.
One idea could be Ravenschild going on a solo mission that involves infiltrating a high - security enemy base. He could use his unique skills and gadgets to outwit the guards and steal crucial information.
One idea could be a story where Illya and Gaby have to go undercover as a married couple on a luxury cruise to track down a dangerous smuggler. They'd have to deal with all the typical cruise activities while also staying on the mission's track.
One idea could be a story where the two main characters have to go undercover in a high - society ball to stop a dangerous weapon trade. Another could be a time - travel plot where they are sent back to a crucial moment in history to prevent a major catastrophe. Or perhaps a story where they are framed for a crime and have to clear their names while also uncovering a larger conspiracy.
One idea could be that Uncle Grandpa teams up with characters from another show to go on a wacky adventure across different dimensions. Maybe he meets some characters who are lost and he uses his unique abilities to help them find their way home. Another idea is that he has a cooking competition with characters from a different universe, leading to a lot of chaos and funny food combinations.
A possible plot for 'old man logan crossover fanfiction' is a crossover with the Fantastic Four. Old Man Logan could end up in their Baxter Building and get involved in one of their scientific experiments gone wrong. He might have to use his combat skills to help them fix the situation. Another idea is a crossover with Hellboy. Logan and Hellboy could team up to fight some supernatural demons that are causing chaos in both their worlds. Also, a crossover with the Teenage Mutant Ninja Turtles could be really fun. Logan could teach the turtles some new combat moves while they introduce him to the sewers and their unique way of life.
One idea could be that Spider Man gets transported to an alternate dimension where he meets different versions of his female friends and allies, and they all have feelings for him. For example, Mary Jane from a noir - styled universe, Gwen Stacy from a steampunk world, and Felicia Hardy from a magical realm. They all team up with him to fight a common enemy while dealing with their romantic feelings for him.
One idea could be a crossover with the X - Men. Spider - Man could find himself in the middle of a conflict between mutants and anti - mutant forces. He'd have to use his quick thinking and agility to help the X - Men protect the young mutants. Another could be a crossover with the Fantastic Four. Maybe Spider - Man gets caught in one of Reed Richards' experiments gone wrong and they all have to work together to fix it while also dealing with a new super - villain that emerges from the chaos.
One idea could be that Iron Man's technology somehow gets integrated into the world of RWBY. Maybe his suits' energy systems could be used to power up the Huntsmen and Huntresses' weapons. For example, Ruby could have a Crescent Rose upgrade with Iron Man's repulsor technology, allowing for more powerful ranged attacks.