Well, it could be that Sasuke and Sakura are on a journey when they find out about the pregnancy. They then have to find a safe place to stay. Along the way, they meet different people who either help or hinder them. Meanwhile, they are also having deep conversations about their relationship and what kind of parents they want to be. They might also be worried about passing on their ninja skills and the burdens that come with it to their child, and how they can raise the child in a more peaceful world.
One possible plotline could be that there is some sort of magical or experimental accident that causes Sakura to become pregnant. Sasori, who may have initially been an adversary, could then be forced to face his feelings and take on a more protective role. Another could be a situation where they are in an alternate universe where their relationship is different from the original source, and the pregnancy occurs as a result of their new - found love in that universe.
One possible plotline could be that it's a result of some sort of ancient Jedi or Sith ritual. Maybe they accidentally trigger it while exploring an old temple together. The rest of the story could be about them trying to figure out what it means, how to deal with the potential implications for the galaxy, and how their relationship changes as they face this new situation. Another plotline could be that it's a product of a powerful force - bond between them. They have to come to terms with this unexpected development and decide whether to keep the baby or not, all while dealing with the political and power struggles in the Star Wars universe.
One possible plotline could be centered around the friendship aspect. Harry, Hermione, and Ginny might be worried about how their friendship will be affected by the pregnancies. They could work together to ensure that they still support each other through the changes. Another could be about how the wizarding community reacts. Maybe there are some old - fashioned views that they have to deal with, but they prove everyone wrong by handling the situation gracefully.
One possible plotline could be Sasuke discovers he's pregnant while on a solo mission. He then has to figure out how to deal with this situation while also hiding it from his enemies. Another could be that it's the result of some sort of magic or experimental jutsu gone wrong. He then has to face the reactions of his friends and family, especially Naruto, who might be shocked but also supportive.
There could be a story where Sakura and Gaara are part of a team. Sakura starts to train with a new sensei who has different methods. Gaara, not understanding the new training regime, thinks Sakura is being unfaithful to their old training ways. This causes a rift between them, but as the story progresses, they both come to understand each other's perspectives and the importance of different training approaches.
One possible plotline could be that Black Widow gets pregnant through some sort of scientific experiment gone wrong. But instead of it being something dark, it becomes a journey of self - discovery. She could start to see the world in a different light, with more hope for the future, and the other Avengers could help her come to terms with this new situation.
One plotline could be that Ino discovers she's pregnant during a crucial mission for the village. She has to balance her duties as a ninja and her pregnancy. Her friends and family support her, and she learns new ways to use her mind - related jutsu during this time. For example, she might be able to communicate with the unborn baby using her telepathic abilities.
One possible plotline could be that Itachi, in his guise of being a rogue ninja, encounters Sakura on a mission. Sakura, initially distrustful, comes to realize that Itachi has his own reasons for his actions. They form an uneasy alliance to achieve a common goal, like protecting a village from a greater threat.
In this fanfiction, it could be that Sasuke returns to the village and he and Sakura start to build a life together. Their friends are happy for them, and then Sakura becomes pregnant. The story might explore how the news affects their friends and family, and also how Sasuke and Sakura grow as a couple during this time.
Another plotline could be based on a prophecy. There could be an ancient prophecy that foretold of a union between Salazar (through some form of time - traveling or magical reincarnation perhaps) and Harry that would result in a special child. The story could then focus on how they deal with this unexpected situation, trying to understand the prophecy and their new - found connection.