Perhaps the sister discovers that there is a curse on their family that causes one member to become a killer. She believes that she can break this curse. So, she starts to look for ancient spells or artifacts that could reverse what has happened to Michael. Along the way, she faces many obstacles and has to fight against those who want to keep Michael as he is, a symbol of fear.
One possible plot could be that Michael Myers somehow ends up in Gotham. Batman starts to notice a series of murders that seem different from the norm in his city. As he investigates, he discovers that it's Michael Myers. Batman then tries to track him down. Meanwhile, Michael Myers is just doing what he does best - stalking and killing. The two finally cross paths, and the battle begins. Batman has to figure out how to stop this seemingly unstoppable force.
Perhaps Bella is a time - traveler. She travels back in time to the era when Michael Myers was just a child. She tries to prevent the events that would turn him into a killer. However, her presence in the past causes some unexpected changes. Michael starts to develop a bond with Bella, and she has to figure out how to change his fate without completely disrupting the timeline.
One possible plot is that Jake is a journalist who is intrigued by the legend of Michael Myers. He starts to dig deeper into Michael's story and accidentally summons him. Instead of running away, Jake decides to face Michael. Through a series of encounters, they start to develop a complex relationship. Jake begins to humanize Michael in his writing, which causes a stir in the town, and they both have to deal with the consequences of this new perspective.
A plot could be that Kaname's sister discovers a long - lost vampire power that has been dormant in their bloodline. She decides to use this power to bridge the gap between the pureblood vampires and the lower - level vampires. This causes some purebloods to oppose her as they fear a change in the power structure. But she is determined to bring about a new era of peace and coexistence among vampires.
A great plot could involve her having a prophecy associated with her. The prophecy could state that she will either bring about the end of all supernatural chaos or be the cause of its ultimate destruction. This would put her in a very difficult position. Everyone in the Supernatural world, from the angels to the demons to the hunters, would be interested in her. Some would want to protect her to ensure the positive outcome of the prophecy, while others would want to kill her to prevent the negative one. Along the way, she would have to learn about her true nature and powers, and make choices that would determine the fate of the entire Supernatural realm.
A possible unique plot could be that Michael Myers time - travels to a different era due to some supernatural event. In this new era, he meets a woman who has the ability to see his true self beneath the mask. She helps him understand his own humanity, and they fall in love. Their love is tested as they try to find a way back to his original time while also facing the challenges of her world.
Perhaps Fleur Delacour's sister is an exchange student from Beauxbatons to Hogwarts for a special program. She arrives with high expectations but is met with some resistance from the Hogwarts students who are a bit jealous of her connection to Fleur. However, she quickly proves herself by being extremely talented in a different area of magic, like potion - making. She then enters the Triwizard Tournament as an honorary contestant (due to some special rule) and has to face various challenges, all while trying to make friends and fit in at Hogwarts.
One possible fanfiction could be about Michael Myers' sister trying to understand his actions. Maybe she discovers some hidden secrets in their family's past that might have led to Michael's violent tendencies. She could be on a journey to either stop him or find a way to redeem him.
A simple plot could be that Jake is always the target of Michael Myers during the trials. Michael sees something in Jake that makes him want to hunt him down specifically. Jake then has to constantly find new ways to avoid Michael, like hiding in places Michael wouldn't expect or using the environment to his advantage.
The plot could start with a young woman named Ava who moves to Haddonfield. She is curious about the local legend of Michael Myers. One day, she catches a glimpse of him. Instead of being scared, she feels a sense of pity. She starts to leave food out for him. Michael, who has never experienced such kindness, becomes curious about her. As the story progresses, Ava continues to show him small acts of kindness, and Michael begins to protect her from other dangers in the town, leading to a strange love developing between them.