What could be the plot of 'the flash kidnapped fanfiction'?

It could be Iris. Since she's an important character in The Flash's story. The Flash might be forced to kidnap her for some strange reason, like to protect her from a threat that he can't explain to her directly.

I'm not entirely sure specifically what 'flash kidnapped fanfiction' refers to without more context. It could be a fan - created story in which a character named Flash is kidnapped within the realm of fanfiction. Fanfiction often takes existing characters and creates new, sometimes wild, storylines.

In the fanfiction, they might be kidnapped by a supervillain who wants to use them as bait to lure Spider - Man. Maybe the kidnapper thinks Flash has some connection to Peter Parker (aka Spider - Man) and plans to expose his identity through Flash.

One possible plot could be that Aladdin is kidnapped by a powerful sorcerer who wants to use his knowledge of the magic lamp to gain more power. His friends, Jasmine and Genie, then have to embark on a dangerous journey to rescue him. They might face various obstacles along the way, like magical traps and other evil minions.

One possible plot could be that Luigi is kidnapped by a group of mischievous goombas who are being controlled by a powerful dark magic user. Luigi, while kidnapped, uses his wits to befriend some of the weaker goombas and gets them to help him send a message to Mario. Mario then has to figure out where Luigi is being held based on the clues in the message.

Well, it could be about a person, maybe a young adventurer, who is captured by pirates. The story might then revolve around their attempts to escape or adapt to life on the pirate ship.

Well, it could be that pirates kidnap Moana. They have heard tales of her island's treasures. Once on their ship, Moana has to face the rough and rowdy pirates. She manages to befriend some of the more sympathetic ones among them and together they plot against the cruel captain. Eventually, she uses her knowledge of the sea to help them all when they get into trouble, and in return, they set her free.

The plot might involve a character being lured into Pennywise's lair, perhaps by the allure of missing things or people. Pennywise could use his shape - shifting abilities to deceive the kidnapped character throughout their captivity.

Well, it could be that Luffy gets kidnapped because of some secret he holds. Maybe there's a group that wants to find out the location of One Piece through Luffy, and they think kidnapping him is the best way. His friends then have to search for clues and race against time to save him before he's forced to reveal the information.

In a 'Vegeta kidnapped' fanfiction, perhaps Vegeta could be kidnapped by an old enemy seeking revenge. This enemy might be from his Saiyan past. They could be using him to draw out Goku, thinking Goku will come to save Vegeta. Vegeta, being proud, would likely struggle against his captors and try to break free on his own at first.