One possible plot could be Jane the Killer dealing with the challenges of pregnancy while also trying to hide her identity from her enemies. Another could be her having to protect her unborn child from the dark forces that are part of her world.
In some stories, Jane's pregnancy could be a result of a strange or supernatural event. For example, she might have been cursed or there could be some sort of magic involved. This could lead to a whole series of events where she has to figure out how to deal with the pregnancy in the context of the abnormal circumstances, all while still being the feared 'Jane the Killer'.
One interesting plot could be their unexpected alliance. Maybe they are forced to team up against a greater evil in the fanfic. This would create a lot of tension as they have their own issues with each other but have to put them aside for the common good.
Maybe there's a friend or an ally that Jane has had in her past adventures who now steps up to support her during her pregnancy. This character could provide her with a place to stay, food, and protection from those who might want to harm her because of her pregnancy or her past as a killer.
One interesting plot could be their journey of understanding each other's powers. For example, if Jane has her unique vampire abilities and Bella has her own set of skills or traits, they might have to figure out how to combine or work with them. Another plot could be them facing challenges from the vampire coven. Maybe some members don't approve of their bond and they have to fight for their relationship.
In some fanfictions, Mary Jane's pregnancy could be the result of some sort of experiment gone wrong that also affected Spider - Man. This could lead to a story where they have to figure out how to deal with the changes in their bodies and powers while also preparing for the arrival of the baby. There could also be a plot where Mary Jane is kidnapped by an enemy who wants to use the unborn baby for their own evil purposes, and Spider - Man has to rescue her.
One interesting plot could be a contract killer who is hired to assassinate a major Naruto character but then discovers that the target is actually innocent. This leads to a moral dilemma for the killer, whether to go through with the job or expose the real plot behind the contract.
One possible plot could be Eren's journey of self - discovery during the pregnancy. He might face challenges in a world that doesn't expect a male to be pregnant, like dealing with strange looks and having to reevaluate his own identity. Another plot could involve the support system around him. His friends might initially be shocked but then come to accept and support him through the pregnancy, creating a story about friendship and acceptance.
Well, some might involve how the character deals with the unexpected pregnancy while still being in the iCarly crew. Maybe she tries to balance her online show with her new situation.
One interesting plot could be how the pregnant character manages to keep up with their studies at Hogwarts while dealing with the physical and emotional changes. Maybe they have to hide it from some strict professors.
One possible plot could be about how the pregnancy affects Gaster's relationships with other characters in the fictional universe. Maybe it causes some characters to be more protective, while others are skeptical or even hostile.
Some interesting ideas might include how the pregnancy came about in the first place in the context of the 'Jeff the Killer' world. Is it some sort of dark magic or a strange encounter? And then there's the aspect of how this pregnancy might change the power dynamics between Jeff and other characters. Maybe she becomes more vulnerable and has to rely on unexpected allies.