A great plot twist could be that Legolas fakes his own kidnapping. He has discovered a conspiracy within his own people and needs to expose it without being detected. So, he stages his kidnapping to draw out the conspirators. This would lead to a lot of self - discovery for Legolas as he has to deceive his closest friends and allies.
One possible plot twist could be that the kidnappers are not who they seem. Maybe they are being controlled by an ancient evil force that wants to use Legolas for some dark ritual. Another twist could be that Legolas is kidnapped as a decoy to draw out his friends, and then the real target is revealed later. For example, the kidnappers might be after a powerful elven artifact that Legolas's friends possess.
Perhaps the kidnappers are actually a group of lost elves who believe Legolas is the key to their salvation. They think that by kidnapping him, they can force him to help them find their way back to their former glory. This would create an interesting dynamic as Legolas has to decide whether to help them or escape and report back to his own people.
One interesting plot twist could be that Itachi has a hidden motive that is actually to protect Sasuke from a greater threat. Maybe there's a powerful enemy that Itachi knows will target Sasuke, so he kidnaps him to keep him in a secret location and train him in secret. Another twist could be that Itachi is being controlled by some dark jutsu and he doesn't really want to kidnap Sasuke but has no choice. This could lead to a journey of Sasuke trying to break the control over Itachi. Also, it could be that Itachi kidnaps Sasuke to reveal some long - hidden family secrets that Sasuke needs to know in order to become stronger.
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.
A possible plot twist is that the kidnapper is being controlled by an otherworldly force, and Mokuba discovers a way to break the control. For example, he might find a magical item within the kidnapping location. Another plot twist could be that Mokuba's kidnapping was part of a bigger scheme to frame Seto Kaiba for a crime he didn't commit. This would add a layer of drama as Seto has to race against time to clear his name and save his brother. Also, it could be that the kidnapper is actually Mokuba's long - lost relative who wants to reconnect in a very extreme way.
Maybe the Akatsuki members who kidnapped Naruto start to have second thoughts. Some of them might realize that Naruto is not just a tool for their goals. They could begin to see his value as a person and his potential to bring peace in a different way. This could lead to internal conflicts within the Akatsuki group.
A really unexpected plot twist could be that the kidnappers are actually the good guys in a convoluted way. Maybe they know of a prophecy that Sasuke and Sakura are fated to bring destruction, so they are trying to stop it. Another idea is that during the kidnapping, Sasuke and Sakura end up in a different dimension where they have to rely on each other in completely new ways. Plus, the motives of the kidnappers could be related to a secret that Sakura has been hiding about her family all along.
One interesting plot twist could be that their different upbringings within the wizarding world lead to a complete role reversal. Harry, raised in the Malfoy family, might be more prejudiced at first, while Draco, having grown up with the Weasleys perhaps, could be more open - minded. This would shatter the initial expectations of their characters and lead to a complex exploration of nature versus nurture in the wizarding world.
One possible plot twist could be that Mikey was kidnapped by an unexpected enemy, like a former ally who turned bad. Maybe it was someone he trusted, and this betrayal adds a layer of drama.
One possible plot twist could be that Dabi forgets his hatred for his family. This would completely change his dynamic with his father, Endeavor. Instead of seeking revenge, he might start to question the reasons behind his former animosity. Maybe he'll even try to reconcile with his family members, which would shock everyone around him, especially those in the League of Villains who were counting on his vendetta to fuel their plans.
One possible plot twist could be that the kidnappers turn out to be working for an old enemy of the Hidden Leaf who has a personal vendetta against Naruto. Maybe they plan to use Naruto as a sacrifice to revive an ancient evil. Another twist could be that the kidnappers are actually being controlled by a powerful genjutsu user within the village who wants to disrupt the sealing for their own political gain.
One possible plot twist could be that the kidnapper is actually related to Naruto in some way. Maybe a long - lost relative who has some sort of vendetta against the Hidden Leaf Village and thinks taking Naruto will give them leverage. Another could be that the kidnapper is being controlled by a greater evil force that wants to use Naruto's special powers for their own dark purposes. For example, they might want to extract the Nine - Tailed Fox's chakra from Naruto while he's still a baby and vulnerable.