A really interesting plot could be a fanfiction where Sasori is reborn as a human in a world full of sentient puppets. He has to learn to live without his puppet body and understand the emotions and relationships of the puppet society while still having his memories of being a puppet - master.
One idea could be that Sasori is transported into a world of puppets where he has to face his own creations turned against him in a strange, new society of puppet - makers. This would put his skills to the test in a unique way.
Perhaps a crossover where Sasori teams up with a puppet - master from another universe. They could combine their skills to create an ultimate puppet that has the powers of both their worlds. For example, if the other puppet - master uses magic in their puppet - making, Sasori could incorporate his advanced mechanical skills.
When writing Sasori's character interactions in a crossover, consider his past. He has a lot of trauma related to his own transformation into a puppet. If he meets a character who has also faced some form of self - alteration or loss of humanity, there could be a deep connection. Maybe they start by sharing their stories hesitantly and then form an unlikely bond based on their shared experiences.
One idea could be Sasori traveling back to his childhood and trying to change his path towards becoming a puppet. He might attempt to save his parents and avoid the tragedies that led him to his cold-hearted ways. Another plot could be Sasori traveling to a future where the Akatsuki has achieved its goals, only to find that the world is in a state he didn't expect, so he has to go back and change the Akatsuki's plans. Or he could travel to different ninja villages' pasts to steal their most powerful puppet - making secrets.
A really interesting plot could be a story where Sakura is captured by the Akatsuki, specifically by Deidara and Sasori. Instead of being a damsel in distress, she uses her medical skills and intelligence to outwit them and eventually forms an unexpected bond with them. Maybe they start to question their own motives and actions because of her influence. This would be a great way to explore the characters' personalities and moral compasses in a new light. It could also involve a lot of action scenes as Sakura tries to escape and the two Akatsuki members try to keep her under control.
One interesting plot idea could be that Sasori, who is a bit of an outcast due to his unique artistic style, meets Sakura in the art club at high school. Sakura, initially hesitant, starts to see the beauty in Sasori's work and they collaborate on a big art project for the school festival. This could lead to a budding friendship or even a romantic relationship as they discover more about each other's pasts and dreams.
One idea could be that the OC is a healer who tries to understand Sasori's pain from his past and gradually changes his view on life. For example, the OC might encounter Sasori during a mission and instead of fighting, she tries to communicate with him, which intrigues Sasori as no one has ever done that before.
Well, in 'naruto puppet bloodline fanfiction', a cool plot could be that the puppet bloodline allows the user to control not just physical puppets but also puppets made of chakra. This would open up a whole new world of combat and strategy. Also, perhaps a story where a young ninja with the puppet bloodline is ostracized by their village because of the strange and powerful nature of their ability. They then have to prove their worth and that their bloodline is a gift, not a curse.
One idea could be a story where a character creates a human puppet of a long - lost ninja. This puppet could hold the memories of the original person and be used to uncover secrets from the past. For example, it might remember a hidden jutsu or a secret alliance that was long forgotten.
One idea could be that the puppet sannin create a super - powerful puppet that requires the combined skills of Naruto and his friends to defeat. Maybe this puppet has the ability to absorb chakra and uses it to grow stronger.
One idea could be that they are forced to work together on a diplomatic mission between their respective villages. Along the way, they learn about each other's values and pasts. Sakura could share stories about her training with Tsunade, and Sasori could talk about his days as a puppet maker. This would build a mutual respect between them.
One idea could be a young shinobi discovers the ancient art of human puppetry by accident. He then has to hide this newfound power from his village as they view it as a dark and forbidden art. As he delves deeper, he starts to understand the true potential of it not just in combat but also in espionage.