Perhaps Madara kidnaps Sakura in an attempt to disrupt the balance of power in the ninja world. Since Sakura is an important part of Team 7, her absence would cause chaos among her comrades. He might also believe that Sakura has some hidden knowledge, like about the secrets of the Uzumaki clan or something related to the tailed beasts, and he wants to extract that information from her.
Well, it could be that Madara has a more personal reason for kidnapping Sakura. He might have seen her growth and tenacity during battles and views her as a worthy opponent or even a potential successor in his own warped view. So he kidnaps her to train her in his ways, away from the influence of the Hidden Leaf. He could try to break her spirit and remold her into a tool for his own grand plan of world domination.
One possible plotline could be that Madara kidnaps Sakura to use her as a bargaining chip against Naruto and the Hidden Leaf. Maybe he thinks her medical skills can be useful to heal his own troops or himself. Another could be that Madara has some strange fascination with Sakura's strength and potential, and wants to study her or turn her to his side.
One possible plotline could be that Sakura is in a dangerous battle against a powerful enemy. Madara, who might be an unexpected ally, steps in. He uses his powerful jutsu to fend off the enemy and saves Sakura. Maybe Madara has his own reasons, like seeing Sakura's potential or having a newfound respect for her skills.
A plot could involve a post - apocalyptic world where Madara and Sakura are some of the few survivors. They find a lemon, which is the last remaining piece of the old world's agriculture. The story could be about them trying to preserve it and recreate a sustainable environment. Madara, with his vast knowledge of the old world and Sakura's determination and skills, work together. The lemon becomes a symbol of hope in this desolate world, and their relationship could develop from mutual respect for their shared goal to something deeper.
One possible plotline could be that they are forced into a situation where they have to be together, and over time, feelings develop and Sakura gets pregnant. Another could be a magical or alternate universe situation where their relationship is different from the original Naruto story, leading to her pregnancy.
A plotline could revolve around Sakura trying to understand Tsunade's past more deeply. Tsunade might be reluctant at first, but as they work together more closely, she starts to open up. This could lead to Sakura learning important life lessons from Tsunade's experiences, like how to deal with loss and keep going. They could also get into a situation where they have to use their combined medical and combat skills to save a group of injured ninjas.
One possible plotline could be exploring their shared heritage. Maybe they discover they are brothers early on and team up against the darker forces in the Naruto universe. They could use their combined powers to bring about a new era of peace in the shinobi world.
A fanfic could be centered around an alternate universe where Madara never turned evil. He and Sakura are both part of the same ninja team. Sakura, with her medical ninjutsu skills, often has to patch up Madara after their tough missions. Over time, Madara starts to respect Sakura not just for her healing abilities but also for her strong will. Sakura, on the other hand, sees a different side of Madara that is not known to many. Their relationship gradually evolves from teammates to close friends and perhaps something more as they face different challenges together in the ninja world.
Perhaps it could be a story where Marrow is injured during a battle and Sakura, being a medical ninja, has to treat him. Kimimaro, who has his own reasons for being there, observes their interaction. This could lead to a series of events where they all get involved in a mystery that is related to some ancient power. Kimimaro might be initially seen as a threat by Marrow and Sakura, but as they dig deeper, they find out that he is also a victim of certain circumstances.
Maybe Sakura teaches Sasuke about emotional control. Sasuke has always been brooding and angry, and Sakura, with her more empathetic nature, could show him how to manage his emotions better. This could lead to Sasuke becoming a more well - rounded ninja and a better teammate.
Maybe Sasuke is jealous because Sakura has achieved some great feat in the ninja world and is getting a lot of attention. In the fanfic, this could lead to Sasuke training even harder to prove himself worthy of her. Sakura, on the other hand, might be confused by Sasuke's sudden distance. She could try to reach out to him, but Sasuke's pride and jealousy keep him from being receptive. It could all come to a head during a dangerous encounter with a powerful enemy where they finally communicate their feelings.
One possible plotline could be Naruto discovers Madara's past in great detail and starts to admire his strength and the vision he once had for the ninja world. He might study Madara's fighting techniques and incorporate some of his strategies into his own combat style. For example, Naruto could be intrigued by Madara's use of the Sharingan and try to find ways to counter it more effectively based on understanding Madara's own approach.