One possible plot twist could be that the matchmaker is the one who needs Mulan's help this time. Maybe she has gotten into some trouble in the village, and Mulan, with her new - found courage and skills, comes to her rescue.
In this fanfiction, Mulan might show the matchmaker how much she has changed. She could prove that she is no longer the girl who was once nervous in front of the matchmaker. Maybe she would tell the matchmaker about her adventures in the army and how she has become more confident and strong.
One interesting plot twist could be that Ladybug, while in a fight, is magically transported to the Mulan universe. There, she has to learn Mulan's way of fighting to get back home. Maybe she teams up with Mulan herself against a common enemy like an akumatized Shan Yu.
Love for sure. They were friends once, and there could be a strong sense of love and care that resurfaces. Also, there might be guilt. Asriel might feel guilty for what happened in the past, and Chara could have their own feelings of guilt or remorse.
Well, a really interesting plot twist in 'Mario Meets Peach Fanfiction' could be that Mario himself is the one being tricked. Bowser has created a fake Peach to lure Mario into a trap. And while Mario is busy trying to rescue the fake Peach, the real Peach is actually in another location, in even greater danger. Also, there could be a plot twist where the power - ups that Mario usually relies on are actually cursed this time. When he uses them, they cause more harm than good. Maybe the super mushroom makes him too big to fit through the narrow passages he needs to reach Peach. Another possibility is that Peach has fallen in love with someone else in the time she has been captive, and Mario has to deal with this new emotional situation.
A possible plot twist could be that Videl turns out to have some hidden powers herself. It would completely change the dynamic between her and Gohan.
Perhaps Madara fakes his death in the fanfiction after meeting Naruto. Naruto then has to deal with the chaos that follows as Madara secretly manipulates events from the shadows. Or, it could be that Naruto's presence causes Madara to have a change of heart, but then the ninja world doesn't believe that Madara has truly changed and they both have to fight against the world's distrust. There are so many ways the plot can take an unexpected turn in this kind of fanfiction.
A plot twist might be that Jotaro loses his Stand abilities temporarily and McCree has to protect him. Or perhaps they find out that there's a traitor among the people they thought were their allies in this fanfiction world. This would force them to re - evaluate their situation and who they can trust. Also, it could be that a powerful artifact they were supposed to protect actually has the power to control them, and they have to fight against its influence.
A potential plot twist could be that Roger is actually a time - traveler. He came from the past to meet Luffy for a specific purpose, like to prevent a great disaster in the pirate world that only Luffy can help with in the future.
One possible plot twist could be that Cersei pretends to surrender to Daenerys. Daenerys, believing her, takes Cersei into her confidence. But Cersei is actually plotting a big betrayal from within. She could be secretly gathering her remaining forces and planning to assassinate Daenerys when the time is right.
In the 'naruto meets nagato fanfiction', a plot twist might be that Nagato fakes his change of heart at first. He could be playing a long - game to deceive Naruto and the Leaf Village. Or perhaps, there is a prophecy that involves both of them, but it has been misinterpreted all along. And when they meet, they start to uncover the real meaning of the prophecy, which changes everything they thought they knew about their fates and the future of the ninja world.