A great plot idea could be that Hinata's pregnancy reveals some new powers or abilities within her. Maybe it has something to do with the Hyuga clan's bloodline. Naruto is both amazed and a little worried. They also have to deal with the expectations of the village. Some people expect their child to be a great ninja from the start. However, they just want their baby to be healthy and happy. Throughout the pregnancy, they learn more about each other and grow even closer as a couple.
Maybe in the fanfiction, Hinata's pregnancy is a result of a special mission she went on with Sasuke. During the pregnancy, she starts to have strange dreams related to the future of the child and the village. These dreams guide her actions as she prepares to become a mother, and she tries to share these insights with Sasuke without giving away too much.
In this fanfiction, Hinata could be badass in a way that she challenges the village elders directly about Naruto's banishment. She argues that Naruto has been the savior of the village multiple times and his banishment is unjust. As she does this, she also showcases her new and improved combat skills, which she has been secretly honing, to intimidate those who oppose her and show that she will fight for Naruto's return.
One plot idea could be the challenges she faces in balancing her ninja duties with her pregnancy. For example, she might have to take on less dangerous missions but still find ways to contribute to the village. Another could be how her friends, like Sakura, support her during this time. They could offer medical advice or just be there for emotional support.
One idea could be exploring how Rey deals with her pregnancy while still being involved in the fight against the dark side. Maybe she has to hide her condition from the enemy. Another could be how her friends in the Resistance support her during this time.
A plot could involve the challenges they face during the pregnancy. Maybe there are threats from old enemies who see the baby as a potential target. Naruto and Temari then have to take extra precautions to protect themselves and the unborn child. They could also go on a journey to find a special kind of medical ninja who can ensure a safe pregnancy for Temari, especially if there are some complications due to her being a ninja. Along the way, they might discover new things about each other and grow even closer as a couple.
One plot idea could be that they face challenges together during the pregnancy. For example, they might have to deal with threats from enemies who see their unborn child as a potential threat or a valuable asset. Naruto's experience and skills, along with Yugito's, would be put to the test as they protect their family.
In a fanfiction like this, the plot could revolve around Karin's pregnancy being a result of some sort of experimental jutsu gone wrong. Naruto, being the hero he is, feels responsible for her well - being. They might have to go on a journey to find a way to reverse the effects of the jutsu if it's dangerous for Karin or the unborn child. Along the way, they face various enemies and also form a deeper bond as they deal with this unexpected situation.
One idea could be that their pregnancies bring the two villages closer together. With Fem Naruto and Gaara both expecting, it could lead to a new era of peace as the two most powerful ninja from their respective villages are about to become parents. This could involve joint efforts in protecting the future of their children, like creating a new safe haven for the new generation.
One plot idea could be that Naruto, while pregnant, travels back in time to the founding of Konoha. He uses his knowledge of the future to prevent certain tragedies from occurring during the village's creation, all while dealing with the physical and emotional challenges of being pregnant in a different time. Another could be that he travels to a time when the Uchiha clan was still intact and tries to change the events that led to their downfall, with his pregnancy adding an extra layer of complexity as he has to protect his unborn child too.
One idea could be that they have to face the challenges of being pregnant in a world full of shinobi battles. Maybe they have to hide their pregnancies from enemies who might see it as a weakness. Another could be that they support each other through the physical and emotional changes, and their friendship grows even deeper during this time.