One possible plotline could be Naruto's first attempts at using chakra as a baby. It would be really cute to see him unknowingly channel his chakra while playing with a toy, and then get a big surprised look on his face when something unexpected happens.
A plotline could revolve around Naruto being adopted by a kind family in the village. The family discovers his special abilities as a baby and tries to protect him while also helping him develop his skills in a loving environment. There could be heartwarming scenes of the family members teaching baby Naruto new things and him responding in his own cute baby ways.
Well, a plotline might involve the cultural differences between Brienne and Tormund coming into play when raising their baby. Tormund's wildling ways and Brienne's more chivalrous background could lead to some interesting parenting moments. Also, there could be a plot where the baby is seen as a symbol of unity between different factions, and they have to deal with the pressure of that. It could also show how they adapt to their new roles as parents while still being true to their own characters.
Perhaps a plotline where the baby grows up in the care of Makino while Shanks is away at sea. The story could show the baby's longing for its father and how Makino tries to keep the memory of Shanks alive for the child. As the baby gets older, it might start to show an interest in following in Shanks' footsteps, which could create some interesting family dynamics and internal conflicts for both Makino and the child.
One possible plotline could be the challenges they face in raising the baby. Maybe there are political or family issues that they need to deal with while protecting their child.
In some 'Sally has a baby' fanfiction, the plot could focus on the baby's growth and development. As the baby grows, Sally discovers new things about the child's personality and talents. There could also be a plotline where Sally faces challenges in her own life because of the baby, such as having to balance her career or personal goals with being a mother. This could lead to her making difficult decisions and growing as a person throughout the story.
One possible plotline could be that Naruto and Sasuke are in a very close friendship. Through some sort of magical or spiritual connection, Naruto becomes responsible for a child that is related to Sasuke in a non - traditional way. They then have to work together to raise the child, facing challenges in the ninja world as a team.
Perhaps in the fanfiction, there's a prophecy or some sort of magical situation. For example, the village needs a new generation of strong shinobi, and it's prophesied that a baby from Sakura and Naruto would be extremely powerful. This leads Sakura to approach Naruto about having a baby. Naruto, being the hero of the village, feels a sense of duty and also his own love for Sakura makes him open to the idea.
One possible plotline could be the two characters dealing with the reactions of their friends and the ninja community. There would be shock, disbelief, and perhaps some opposition as their relationship is not traditional. Another could be them preparing for the arrival of the baby, with Sasuke being protective of Naruto and Naruto being excited yet nervous about becoming a parent.
One possible plotline could be Kushina's daily life taking care of baby Naruto. She might be shown singing lullabies to him, or just watching him sleep with a loving look. Another could be about Naruto showing early signs of his ninja abilities as a baby, like accidentally using chakra in a cute way while Kushina tries to figure out what just happened.
A possible plotline could be that Calypso, with her alluring powers, tries to tempt Naruto away from his path of becoming Hokage. But Naruto, with his strong will, resists and instead tries to show Calypso the importance of having a noble goal. Another plotline might be that Naruto and Calypso team up to fight a powerful entity that is causing chaos in both their worlds.
One possible plotline could be Naruto using his new position as a daimyo to bring about political reform in the ninja world. He might try to end the long - standing feuds between different ninja villages by leveraging his power.