A plot could revolve around a new threat that only the combined efforts of Naruto, Sakura, Boruto, and Sarada can stop. Maybe a powerful and ancient evil that has been awakened. Along the way, there could be character development as Boruto and Sarada learn from Naruto and Sakura's experiences. For example, Sarada could learn more about Sakura's medical ninjutsu and how she used it in battle, while Boruto could understand Naruto's journey to becoming Hokage better.
One idea could be a time - travel plot where Boruto and Sarada are sent back to Naruto and Sakura's genin days. They could witness the early days of Team 7 and get involved in some of their missions, which would change the course of history in unexpected ways.
One idea could be a time - travel fanfiction where Boruto and Sarada end up in the past and meet Naruto and Sakura during their early days. They could help change some small events that have a big impact on the future.
One idea could be a time - travel plot where Boruto and Sarada are sent back to Naruto's era. They could interact with a younger Naruto and help him in some way that changes the future subtly. For example, they might help Naruto with a difficult mission that he barely survived in the original timeline, and this could lead to different relationships in the future.
One idea could be a time - travel fanfiction where Boruto goes back in time and meets a young Naruto. He could help Naruto avoid some of the hardships he faced. Another could be a story where Sarada has to team up with Naruto to save Boruto from a new and powerful enemy. It would be interesting to see their different fighting styles and how they interact.
One idea could be a time - travel plot where Sarada goes back in time and meets a young Naruto. She could learn from his experiences and determination, and in turn, she might influence some of his decisions. This would create an interesting dynamic as they come from different generations but share common goals of protecting the village.
A more emotional plot could be centered around family. Sarada has some doubts about her family, and Naruto and Sakura, having been through their own family - related struggles, could offer her advice and support. They could share their stories of growing up without parents (in Naruto's case) or with a complex family situation (in Sakura's case), which would help Sarada come to terms with her own family issues.
Maybe a story where an enemy targets Sarada to get to Naruto and Sakura. Naruto and Sakura then have to put aside all their differences and past issues to protect their daughter. This could involve flashbacks to their own relationship history and how they overcame obstacles in the past. It could also show Sarada realizing the depth of her parents' love for each other and for her.
A storyline could be that there is a mysterious illness spreading in the village. Sakura and Sarada work together to find a cure, while Naruto and Boruto protect the village from any threats that might take advantage of the situation. It could show the passing on of skills and the importance of teamwork between the generations.
Another idea is that there is a prophecy about the two of them saving the village from a great threat. They initially don't believe it, but as strange events start to occur, they begin to accept their fate and train hard to be able to face the oncoming danger.
One plot idea could be Sarada trying to learn more about her father Sasuke's past adventures. She could ask Sakura for stories, and together they could go on a small journey to a place important to Sasuke's past. This would strengthen their family bond.
In Naruto x Sarada fanfiction, a possible plot is that there is a new threat to the Leaf Village that only their combined skills can defeat. Sarada's intelligence and Sharingan abilities combined with Naruto's vast chakra reserves and Rasengan techniques could make for an exciting battle. Also, it could be interesting if they have to infiltrate an enemy stronghold where they need to rely on each other completely, and in the process, Sarada learns more about Naruto's past and what made him the Hokage.