The plot twist might be that Sakura is forced to marry this person to save her village or loved ones. She doesn't love him but has to go through with it for the greater good. As the story progresses, she could find unexpected qualities in him that make her question her initial feelings. Or perhaps the person she truly loves comes back just as she's about to say 'I do' and there's a big showdown between the two suitors.
One possible plot twist could be that the person Sakura is marrying is actually under a spell. For example, an enemy might have cast a love spell on him to get close to Sakura for some devious plan. Another could be that Sakura discovers at the last minute that the man she's about to marry has a hidden identity. Maybe he's a long - lost relative of an enemy she thought she had defeated. It would add a lot of drama to the story.
Well, perhaps the person she marries is from a different dimension. This would bring in elements of exploring new cultures and powers. The marriage could be a political move to unite two very different groups. And Bulma, being Bulma, would have to navigate through all the new and strange things that come with this situation. It could also lead to her having to choose between her old life and this new one she's been thrust into.
Another possibility is a civilian she has known for a long time in Konoha. Perhaps someone who has always admired her from afar, a merchant who supplies the hospital where she works. He might have shown his love and support for her over the years, and finally, Sakura realizes her feelings for him and decides to marry him.
Maybe the fanfic could be set in a post - war world. Sakura is tired of the constant fighting and death. She then encounters a kind - hearted artist. He shows her a different side of life, full of beauty and creativity. Their relationship develops slowly. However, Sasuke or Naruto might have some issues with her choice at first. But in the end, she follows her heart and marries the artist. The story could also include how she uses her ninja skills to protect the new peaceful life she has built with her new husband.
One possible plot twist could be that the new marriage is a political alliance. For example, if he marries a noblewoman from a far - off land, it could bring new resources and allies to his kingdom. This would create a whole new set of power dynamics as different factions within the court would either support or oppose the new alliance.
A plot twist could be that Sakura and Hinata actually team up against Naruto in some way. Perhaps they realize that Naruto is being pushed into a relationship by the village elders for political reasons. So, they decide to fake a relationship between themselves to make Naruto see that he should be free to choose his own path and not be pressured into a marriage. This would turn the typical love triangle on its head.
Well, it could be a story where Sasuke saves Sakura from someone else who might be a threat. Maybe it's an enemy from another village or a rogue ninja. Sasuke, with his powerful skills, steps in to protect Sakura.
Well, it could be a new character introduced in the fanfic. Maybe a mysterious stranger who has some special charm that attracts Sakura.
It could be a jealous rival. Maybe there's another ninja who has feelings for Sakura and is trying to keep her away from Sasuke. So Sasuke has to catch her to prevent this rival from taking her away.
Maybe it could be her long - time rival. This would be really unexpected because they've always been at odds. But perhaps there was some hidden admiration or understanding between them all along that they didn't realize until later. It would completely change the dynamic of their relationship from enmity to love, which would be a very interesting turn of events in the fanfic.
A plot twist could be related to Yugito's tailed beast. Maybe the power of the two - Naruto's Nine - Tails and Yugito's Two - Tails - has some unforeseen consequences when they get married. It could attract the wrong kind of attention from those who seek to use tailed - beast power for evil. Or perhaps the tailed beasts themselves have some sort of reaction to their union that changes the relationship between Naruto and Yugito, like they start to communicate with each other in a new and strange way through the beasts.