One idea could be that Roy is kidnapped by an old enemy seeking revenge for past deeds. The kidnapper might try to force Roy to reveal secrets about his superhero friends. Another could be that a powerful criminal organization kidnaps him to use his skills for their own evil purposes. For example, they could want him to create special weapons for them.
In some fanfictions, Roy could be kidnapped by a group of rogue scientists who want to study his enhanced abilities. His friends and allies then have to figure out where he is being held. Meanwhile, Roy tries to escape on his own from the high - tech prison the scientists have created for him, using his wits and his combat skills.
One possible plot twist could be that they were actually set up to be kidnapped by a former ally who has turned against them for some personal vendetta. Maybe this ally blames them for a mission gone wrong in the past and wants to make them suffer.
A possible plot is that Shikamaru is kidnapped by a rival village that believes his strategic mind can give them an edge in an upcoming war. His kidnappers try to brainwash him into working for them. However, Shikamaru uses his wits to resist and also leaves subtle clues for his comrades to find him. His friends, on the other hand, must infiltrate the rival village without getting caught to rescue him.
One idea could be that MacGyver is kidnapped by a group who wants him to build a dangerous weapon for them. He has to use his wits and the limited resources in his captivity to not only escape but also prevent the weapon from being built. Another plot could involve MacGyver being kidnapped by a rival agency who wants to steal his secrets and tradecraft. He then has to outsmart them by creating diversions and makeshift tools within the confined space. A third idea is that he is kidnapped by someone seeking revenge for a past mission gone wrong, and he has to convince his captor of his innocence while finding a way to break free.
One idea could be that Legolas is kidnapped by an old enemy of the elves. This enemy might want to use Legolas as a bargaining chip to get some powerful elven artifact. Another plot could involve a powerful dark magic user who kidnaps Legolas to drain his life force which is believed to be very strong due to his elven heritage. A third option is that he is kidnapped by a group who mistakes him for someone else who has great value to them.
In a fanfiction about Ginny Weasley being kidnapped, perhaps she's kidnapped by a jealous rival. This rival could be envious of Ginny's relationship with Harry or her popularity at Hogwarts. As Ginny is held captive, she could use her own wits and magical skills to try and escape, while her friends are on a desperate search for her, leading to a tense and exciting story full of twists and turns.
One idea could be that the kidnappers are from a rival tech company trying to steal Stark's latest inventions. They hold him hostage in an abandoned factory and he has to use his wits and some makeshift gadgets to escape. Another plot could involve a group of villains who want revenge on Stark for past defeats and they kidnap him to lure his superhero friends into a trap. A third idea is that a mysterious organization kidnaps him to force him to build a powerful weapon for their own evil purposes.
One plot idea could be that Twilight is kidnapped by a group of shadowy creatures who want to steal her magic for their own dark purposes. Her friends then embark on a quest to rescue her, facing various challenges along the way. Another could be that she's kidnapped by a jealous rival from another land who wants to prove their superiority. Twilight might have to use her wits and hidden powers to escape on her own while her friends are on their way.
One plot idea could be that Matt is kidnapped by a criminal organization that wants to use his enhanced senses against his will. Maybe they plan to force him to listen in on their enemies' conversations or locate hidden treasures for them. Another idea is that he's kidnapped by someone who has a vendetta against Daredevil and wants to expose his identity to the world. They could hold him hostage and start releasing small hints about who he really is, putting Matt and his loved ones in danger.
One plot idea could be that a group of rogue smugglers kidnap Princess Leia in an attempt to ransom her to the Rebel Alliance for a large sum of credits. The Alliance then has to send in a covert team, led by a young and inexperienced but brave pilot, to rescue her. Another idea is that an ancient and long - forgotten cult kidnaps her because they believe she has some special power or connection to an ancient prophecy. They take her to their hidden lair on a desolate planet, and her friends have to decipher the cult's secrets to find her. A third plot could be that a power - hungry warlord from a far - flung sector kidnaps her to use as a bargaining chip in his political games against the Empire.
One idea could be that an ancient evil sorcerer kidnaps Wonder Woman to use her powers to open a portal to a dark dimension. Another could be that a group of power - hungry villains kidnap her to force her to reveal the secrets of Themyscira. Maybe a tech - based criminal organization abducts her to try and replicate her strength in their machines.