Well, a great plot twist could be that Draco, now a girl, has her memories of being a boy slowly fading away. This causes her to struggle with her identity in a whole new way. She starts to develop relationships based on her new self, and it turns out she has a natural talent for a subject like Divination, which she had previously scoffed at. This newfound interest and talent could lead her on a different path in Hogwarts, away from the typical Slytherin pursuits.
One possible plot twist could be that the bracelets hold a hidden power. For example, they might be the key to unlocking an ancient magic that can help Draco escape the prison. Another twist could be that the bracelets are linked to someone else's fate, and by removing them, Draco unknowingly endangers another character.
Another possibility is that Draco falls in love with a character from the opposing side. His love could be so strong that it overrides his loyalty to his original side, leading him to change. For example, if he falls for a Gryffindor, he might start to see things from their perspective and gradually shift his allegiance.
One interesting plot twist could be that Ginny and Draco's pregnancy is a result of a magical accident. Maybe a spell gone wrong during a battle or an experiment that binds their magical essences together. Another could be that they keep the pregnancy a secret from everyone at first, and as they struggle to come to terms with it, they start to develop unexpected feelings for each other. For example, Draco, who has always been a bit of a snob, realizes Ginny's true strength and kindness through this situation. And Ginny sees a more vulnerable side of Draco that she didn't expect.
One interesting plot twist could be that Draco saves Hermione not out of pure altruism but because he discovers a dark plot against the wizarding world that Hermione unknowingly holds the key to solving. So, by saving her, he's also saving himself and his family from a greater threat.
One interesting plot twist could be that Buffy becomes a vampire but still retains some of her Slayer powers. This creates an internal struggle as she has to fight her new vampire instincts while also using her old skills. Another could be that she turns into a vampire and finds out that there's a whole new level of vampire society that she was unaware of, which changes her perspective on the whole vampire - slayer dynamic.
One interesting plot twist could be that Inuyasha, as a girl, has a unique power that only female demons possess. This power might attract different types of enemies and allies. For example, she could have the ability to communicate with ancient female spirits that hold the secrets to defeating a powerful new foe. Another twist could be in her relationships. Instead of the typical male - led romances, she could be the one pursued by multiple suitors, both human and demon, which would change the dynamics of the story completely.
One interesting plot twist could be that Draco and Ginny initially resist the arranged marriage but then find common ground in their shared love for a particular magical art, like potions. They start working together secretly on new potion recipes and gradually fall in love. Another twist could be that there is a mystery surrounding the arranged marriage, like it was actually set up by an enemy to cause chaos in the wizarding world. As they dig deeper, they uncover a conspiracy and have to work together to stop it. And a third plot twist might be that Ginny discovers she has a long - lost relative who is related to Draco's family, which changes their perspective on the arranged marriage completely.
In some of these fanfictions, a great plot twist is that Draco, being a Muggleborn, is actually a long - lost heir to a powerful Muggle - related magical artifact or prophecy. This throws the whole wizarding world into chaos as different factions try to either use him or protect him. Also, there could be a plot twist where Draco uses his knowledge of the Muggle world to outwit dark wizards. Since he has a connection to the Muggle world that most pure - bloods don't, he can come up with strategies that are completely unexpected, like using Muggle technology in a magical way to defeat his enemies.
One interesting plot twist could be Draco secretly helping Harry Potter in the Triwizard Tournament tasks. Maybe he realizes that there's a greater danger at play that could affect both the wizarding world and his own family, so he decides to put aside their rivalry for a while.
A great plot twist could be that in the time travel, they end up in an alternate version of Hogwarts where the roles are reversed. Ginny is in Slytherin and Draco is in Gryffindor. This makes them see each other in a completely different light. They have to deal with the prejudices of their new houses while also trying to find a way back to their own time and original selves.