One possible plot could be that Sakura's real mother was in hiding for some reason, like she was being hunted. Sakura accidentally stumbles upon the truth and has to find a way to protect her mother. Along the way, she learns about her mother's past, her family heritage, and maybe even discovers some long - lost relatives. This could lead to a series of adventures as Sakura tries to keep her mother safe and uncover the whole truth.
Obviously, Sakura's mother herself. And her family members like her parents or siblings if they are relevant to the story. They could have influenced her in different ways.
Perhaps it focuses on her relationships. It could show how she met Sakura's father and what their courtship was like. There might be some interesting stories about their first encounters and how they fell in love in a world full of ninjas.
Maybe Sakura's adoptive parents. Their relationship with Sakura could be explored further in relation to the discovery of her real mother. They might have some secrets of their own regarding how they came to adopt Sakura or they could be in conflict with Sakura as she tries to find her real mother.
One possible plot could be about Sakura's parents' courtship. Maybe they met in a beautiful cherry blossom garden, where her father was immediately smitten by her mother's beauty and kind heart. They then overcame some family - imposed obstacles to be together.
If it's a positive fanfiction, possible themes could be the mother - daughter relationship, like how the mother passes on her wisdom to Sakura.
In such fanfiction, one plot point could be how the relationship between Sakura and Naruto's father (presumably Minato) developed. Also, it would likely change Naruto's personality development. Since Sakura has different values and traits from Kushina, Naruto might grow up with different outlooks on life and his ninja career. Additionally, the interactions between Naruto and other characters like Sasuke and Kakashi would be different due to this new family dynamic.
Well, it could involve Sakura facing her inner demons, perhaps in a battle against her own dark thoughts and temptations. Maybe she has to struggle with a new power that has a dark side to it.
One possible plot could be that Sakura grows up not knowing who her father is. As she discovers her connection to Hidan, she might struggle with her identity. She could be conflicted between her ninja values learned in Konoha and the more extreme and violent nature associated with Hidan. Maybe she tries to understand Hidan's past and motives while also dealing with how the ninja world would view her as his daughter.
One possible plot development could be that Sakura has an innate talent for interrogation, inherited from Ibiki. This could lead to her getting involved in more espionage - related missions in the fanfiction.
A possible plot could revolve around a magical world where the sakura in heat is a sign of a coming change. The sakura's intense state of bloom releases a special kind of magic that affects the animals and other plants in the area. There could be a group of adventurers who are trying to understand this phenomenon. They meet different characters along the way, like an old hermit who has knowledge about the sakura's cycles and they all work together to protect the sakura when a dark force tries to corrupt its magic.