Another possibility is a new villain who has emerged and sees Roy and Dick as symbols of the superhero establishment that he wants to undermine. This new villain could be someone with a grudge against the way heroes operate in general and thinks that by kidnapping them, he can make a statement.
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.
There might be. Fanfiction often takes beloved characters like Dick Grayson and puts them in unexpected situations. A 'Dick Grayson kidnapped' fanfiction could also involve him being abducted by a new, original villain created by the fanfiction author. This new villain could have unique motives and powers, leading to a completely different kind of story compared to the traditional Batman storylines. It gives fans a chance to see how Dick Grayson would react in such a dire situation and how his friends and allies would rescue him.
He could use his acrobatic skills. Dick Grayson is known for his amazing physical abilities. He might be able to swing from Poison Ivy's vines and make his way out of her lair.
In this kind of fanfiction, perhaps the parents have some ulterior motives. Maybe they are being controlled by some dark force. Dick Grayson would surely try to escape using his skills and intelligence. He might also try to figure out why his parents are doing this to him.
Another possibility is that Poison Ivy was hired by one of Dick Grayson's enemies. They want to use Poison Ivy's skills to capture him and then extract information from him, like the identities of other heroes or the location of the Batcave. So, his kidnapping could be part of a much larger and more devious plot.
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.
One common plot element is the rescue mission. His friends or family, like Batman or the Titans, will often start a search to find him. Another element could be Dick Grayson trying to escape on his own using his combat skills and wits. Sometimes, there might be a mystery aspect, such as why he was kidnapped in the first place and what the kidnapper really wants from him.
One great fanfiction could be 'The Ascent of Female Dick Grayson'. It shows a new side of the character in a world where she has to face different challenges compared to the male version. It's really interesting to see how the author reimagines her relationships with other characters.