Well, perhaps Drago kidnaps Hiccup because he thinks Hiccup is the key to finding a hidden dragon lair filled with powerful and rare dragons. He might believe that Hiccup has some secret knowledge or connection that can lead him there. And then, the story could follow Hiccup's friends as they try to rescue him and in the process, they uncover more about Drago's past and his real motives for wanting the dragons.
One possible plot twist could be that Drago kidnaps Hiccup to use him as a bargaining chip against the dragons. Maybe he wants to force the dragons to submit to his will by threatening Hiccup's life. Another could be that Drago discovers some special power within Hiccup that he wants to harness for his own evil purposes. For example, Hiccup's ability to communicate with dragons might be something Drago wants to use to control all dragons.
In a fanfiction where Drago kidnaps Hiccup, it could start with Drago seeing Hiccup as a threat to his plans of dominating the dragon world. So he takes Hiccup in a surprise attack. Hiccup, while being held captive, tries to reason with Drago, telling him that there is a better way to co - exist with dragons. But Drago doesn't listen. Meanwhile, Toothless, Hiccup's dragon, goes on a desperate search for his friend. Along the way, Toothless teams up with some other dragons who also have a grudge against Drago. They all work together to find Hiccup and stop Drago once and for all.
Hiccup's friends would be extremely worried. Astrid, being Hiccup's closest friend and love interest, would probably be the first to take action. She would gather the other riders and start planning a rescue mission right away. Snotlout might initially be a bit hesitant, but the thought of losing Hiccup would push him to join in. Fishlegs would use his knowledge of dragons to figure out where Drago might be hiding Hiccup.
In a fanfiction scenario, Viggo might kidnap Hiccup out of jealousy. Hiccup has a special bond with Toothless, a very rare and powerful dragon. Viggo, who has always been obsessed with dragons, may be envious of Hiccup's connection. He kidnaps Hiccup to try and take Toothless for himself. He might think that by having Hiccup in his control, he can make Toothless obey him. He could also use Hiccup as a bargaining chip to get more dragons from Berk.
One possible plot could be that Toothless is under some sort of spell or mind control. Maybe a new villain in the How to Train Your Dragon universe has the power to manipulate dragons. Toothless, being a powerful Night Fury, is forced to kidnap Hiccup. Hiccup, of course, tries to figure out why Toothless is acting this way and how to break the spell.
One possible plot twist could be that Pitch kidnaps Elsa not for his own gain directly, but to use her as a bargaining chip with the other guardians. For example, he might demand that the guardians give up their powers in exchange for Elsa's safe return. Another twist could be that Elsa discovers a new power within herself while being held captive by Pitch. Maybe her fear and the dark environment somehow unlock a power that is related to shadow or ice in a new way. And a third idea is that Pitch kidnaps Elsa because he realizes that her powers are a key to unlocking a greater power source that he wants to control, but Elsa manages to resist his attempts to use her in that way.
Well, in a Dracula kidnaps Mina fanfiction, it could go like this. Mina's friends might think she's dead at first. But then they start to notice strange things around town, like an increase in bat activity. They realize Dracula has taken her. Meanwhile, Mina could be trying to outwit Dracula by pretending to be on his side. She could slowly gain his trust and then find a way to escape when he least expects it.
One possible plot twist could be that Aizen has a hidden motive other than just causing chaos. Maybe he kidnaps Ichigo to use his unique powers for some sort of experiment. For example, he might want to extract the power of Ichigo's Hollow side to enhance his own strength or create a new type of Arrancar. Another twist could be that Aizen is being controlled by an even greater force, and Ichigo's kidnapping is part of a larger plan to draw out other powerful characters in the Soul Society.
Another aspect could be that the Kyuubi is being controlled by a hidden force when it kidnaps Naruto. This hidden force might be using the Kyuubi's power to start a war between the village and other hidden villages. They could be framing the Kyuubi to create chaos, and Naruto, being the jinchuriki, is the key piece in their evil plan. Naruto might then have to figure out a way to break free from the Kyuubi's hold and expose the real villains behind the kidnapping.
In a Toga kidnaps Midoriya fanfiction, the plot could go in various directions. Maybe Toga kidnaps Midoriya to trade him for something she wants from the heroes, like the release of a fellow villain. Midoriya, on the other hand, could try to escape by using his wits and his knowledge of Toga's weaknesses. For example, if he figures out that she has a soft spot for a certain type of person or situation, he could use that to his advantage. Also, the story could involve the other students at U.A. trying to rescue Midoriya. They might come up with a clever plan that involves using their individual quirks in a unique way to outsmart Toga and get Midoriya back.
Another idea is that the fanfiction could be a dark, alternate universe story where Jasper has turned evil. His reasons for kidnapping Bella could be tied to some sort of revenge plot against the Cullens. He might hold a grudge against them for something that happened in the past, and Bella is just a means to get back at them. This would create a very different dynamic compared to the original Twilight story.
One possible plot twist could be that Belle's father, Maurice, teams up with the enchanted objects in the Beast's castle to rescue her. Since Maurice has been to the castle before, he might know some secret passages or ways to get in undetected. Another twist could be that Gaston has an unexpected change of heart during the kidnapping. Maybe he realizes the error of his ways when he sees Belle's true distress and decides to let her go. However, this would be a huge character shift for him given his egotistical and self - centered nature in the original story.