One interesting plot twist could be that when Gajeel is revived, he has some new and unexpected magical powers. Maybe he can now control a different type of magic that was previously unknown to him and his allies. This new power could put him in a unique position within the story's power dynamics.
Perhaps a really unexpected plot twist is that Gajeel's revival is part of a time - travel related event. He is revived not just in the present time but also in a parallel timeline. So, he has to deal with two different versions of his friends and two different sets of problems, all while trying to figure out how he got into this situation in the first place.
One interesting plot twist could be that when Ichigo is revived, he comes back with new and unexpected powers. For example, he might have the ability to control time on a small scale, which he uses to outwit his enemies in battle. Another plot twist could be that his revival is part of a larger, more sinister plan by an unknown force. This force might be using Ichigo as a pawn to achieve their own goals, and Ichigo has to figure out what's really going on while dealing with his new life. A third plot twist could be that Ichigo's revival brings back memories from a past life that he didn't know he had, and these memories hold the key to defeating a powerful enemy that has emerged while he was 'dead'.
One interesting plot twist could be that Naruto is brainwashed into believing his friends are his enemies. So he starts to attack them, but then there are hidden memories that start to resurface during a crucial battle, making him question the brainwashing. This creates a moment of internal struggle within Naruto, which is a great source of drama.
One interesting plot twist could be that the kidnappers are actually being controlled by an old enemy of the Hidden Leaf Village who has a personal vendetta against Naruto. Maybe they plan to use him as a bait to draw out the Hokage. Another twist could be that Naruto is kidnapped by someone he trusts, like a seemingly friendly ninja from another village who has a secret agenda.
A really interesting plot twist could be that Merlin's stabbing is a pre - ordained event. It was foreseen by some ancient prophecy. But instead of it being his end, it is the trigger for a new and powerful form of magic to awaken within him. This new magic could be the key to saving Camelot from an even greater threat that was approaching unnoticed.
One interesting plot twist could be that Ranma forgets not only his identity but also his martial arts skills. This forces him to start from scratch, and in the process, he discovers new ways of fighting that are different from his traditional training. Another twist might be that he forgets his relationships, but starts to fall in love with Akane all over again in a completely new way, leading to a more complex and fresh dynamic between them.
One interesting plot twist could be that Harry, being in Slytherin, forms an unexpected alliance with Draco Malfoy. Instead of the typical rivalry, they team up to uncover a dark secret within the Slytherin house that threatens the whole school. This changes the dynamic of the story as they have to work together despite their differences.
In this fanfiction, perhaps it's an accidental pregnancy. Gajeel and Levy are in the middle of a big adventure together when they realize that Levy is with child. They then have to quickly return to the guild. The guild members have mixed reactions. Some are very happy for them and offer support, while others are worried about how it will impact the two as mages. Gajeel has to learn how to be more gentle and understanding, and Levy has to adjust to the physical and emotional changes that come with pregnancy.
One possible plot twist could be that Levy discovers she has some special magical ability that is enhanced during her pregnancy. This newfound power could attract unwanted attention from dark mages who want to use it for their own gain. Gajeel would then have to go to great lengths to protect Levy and their unborn child.
One possible plot twist could be that while drunk, Kagome accidentally reveals her true feelings for a certain character she has been hiding them from. For example, if she has a secret crush on Inuyasha, in her drunken state, she might blurt out something like 'I've always loved you' which could create a whole new dynamic in their relationship.
One interesting plot twist could be that just before the engagement, Percy discovers he has some long - lost family secret that might put Annabeth in danger. So he has to decide whether to go through with the engagement or keep her safe first. Another could be that an old enemy resurfaces and tries to stop the engagement by framing Percy for something he didn't do. Annabeth then has to prove his innocence.