A plot could revolve around the baby getting kidnapped by a rogue ninja group. Sasuke and Naruko then embark on a dangerous rescue mission. Along the way, they discover more about each other as parents and partners, and also learn new things about their own powers which they use to save their baby.
Perhaps the baby has an unexpected connection to an ancient prophecy. Sasuke and Naruko then have to figure out what this means for their family and the Hidden Leaf Village. They might also face challenges from within the village as some people are suspicious of the baby's power.
One idea could be that the baby has some unique powers inherited from both Naruko and Sasuke. For example, the ability to control both fire and wind in a new and unexpected way. This could lead to various adventures as they try to protect the baby from those who might want to use its power for evil.
One idea could be that Sasuke and Naruko are on a mission together when they find out about the pregnancy. This unexpected news forces them to re - evaluate their ninja lives and how they will protect their future family while still fulfilling their duties to the village.
One idea could be that Naruko and Sasuke are paired for a school project. They start off disliking each other but as they work together, they discover each other's hidden depths and start to develop feelings. Another could be a highschool sports event where Naruko is a cheerleader and Sasuke is a star athlete, and their paths cross in unexpected ways. A third plot could be that they are in a mystery club together and have to solve a mystery within the school which brings them closer.
Well, perhaps a plot where Naruko and Sasuke are sent on a mission to a far - off land to investigate strange disappearances. As they dig deeper, they discover a dark conspiracy that threatens not only their village but the entire ninja world. During this mission, they start to see each other in a new light, and their relationship evolves from just comrades to something more. They have to use their unique skills and abilities to outwit the enemy and save the day. It could also involve some interesting side characters from the different lands they visit.
One idea could be that Naruto and Sasuke find a baby on one of their missions. They then have to figure out how to take care of it while also dealing with the political implications in the ninja world. Maybe the baby has some special power that attracts the attention of both friends and foes.
Perhaps in this fanfiction, baby Sasuke and Naruto are accidentally sent to a parallel dimension. In this dimension, the ninja world is very different. They have to rely on each other more than ever to survive and find a way back home. Along the way, they meet alternate versions of their friends and foes.
One interesting plot could be baby Naruto and baby Sasuke getting lost in the forest together. They have to rely on their budding instincts and nascent chakra to find their way back. Maybe they encounter some small, friendly forest creatures that help them. Another idea is that they accidentally switch places in the village for a day. This leads to chaos as the villagers react differently to them being in the wrong 'homes'.
One plot idea could be Sasuke discovers a way to travel back in time and meets baby Itachi. He then tries to protect Itachi from the future tragedies that he knows will occur. Another could be in a parallel universe where Sasuke is tasked with taking care of baby Itachi and he has to learn how to be a caretaker while also dealing with his own emotional turmoil. Maybe there could also be a plot where an enemy targets baby Itachi and Sasuke has to use all his skills to keep him safe.
Another idea is that baby Sasuke and Naruto are found together by a third party, like a wandering ninja who decides to train them both from a very young age. This would create a different dynamic as they grow up together with a unique set of skills taught by this unknown mentor. They would probably have a stronger bond from the start compared to in the original story.
A great plot idea could be that the baby has some sort of special power that no one has seen before. It causes both excitement and fear in the village. Sasuke and Sakura have to protect their baby from those who might want to use the baby's power for their own gain.