A plot could be that there is a prophecy in the Naruto world about a powerful being from another dimension coming to save it. Baby Beel arrives and Naruto initially mistakes him for a threat. But as they interact, Naruto realizes that Beel is just a lost and scared child. So Naruto teams up with Beel and they work together to defeat a common enemy that is threatening both their worlds.
Maybe Naruto and Baby Beel are brought together by some sort of magical portal. Naruto is intrigued by Beel's horns and super strength. They form an unlikely duo and go on a quest to find a way to send Beel back to his own world. During their journey, they face various enemies and Naruto uses his shadow clone jutsu to protect Beel. Beel, in turn, uses his unique abilities to help Naruto out in tight situations.
It could be Orochimaru. He might be interested in Baby Beel's powers and try to capture him for his own evil experiments. Orochimaru would see Beel as a unique specimen and would stop at nothing to get his hands on him. Naruto would then have to use all his skills and the bond he has with Beel to keep him safe from Orochimaru.
A possible plot is that Mikoto stumbles upon baby Naruto in the forest. She takes him back to the Uchiha compound. There, she raises him as one of their own, much to the confusion of some Uchiha members. As Naruto grows, he starts to show unique abilities that are a combination of his Uzumaki heritage and the influence of the Uchiha environment.
Well, perhaps in the fanfic, their baby has some special ninja abilities from birth. Naruto and Sakura are both proud and a bit worried. They seek advice from their old friends like Kakashi. They train the baby in a new way that combines Naruto's Rasengan - like techniques and Sakura's brute strength. And they face challenges from enemies who want to use the baby's power for evil.
One possible plot could be that Naruto is left alone in his small apartment most of the time as a baby. He might cry for long periods without anyone coming to comfort him. Maybe the villagers, still bitter about the Nine - Tails, avoid helping him. As a result, Naruto grows up with a deep sense of loneliness and a longing for attention from an early age.
Well, in such a fanfic, the plot might involve Naruto finding a baby in a difficult situation, like maybe the baby was orphaned after a battle. Naruto, being the kind - hearted hero he is, decides to take the baby in. He'd then have to learn how to take care of a baby while still handling his ninja duties. He might ask his friends like Sakura for advice on baby - care, and the story could also show how the baby grows up influenced by Naruto's values and the ninja world around it.
Perhaps in the fanfiction, baby Naruto could accidentally use some of the Nine - Tails' chakra in a positive way that helps the village without anyone realizing it was him. For example, he might unknowingly heal a sick part of the forest near the village, and the villagers start to notice strange but good things happening.
One idea could be that Naruto and Sasuke find a mysterious baby in the forest. They then have to figure out where the baby came from and how to take care of it together. This could lead to some comical moments as they struggle with diaper changing and feeding.
A great plot point could be the baby's first steps into the Ninja Academy. It would be exciting to see how Naruto and Hinata support their child in this new environment. There could be some bullies or jealous kids, but the baby, with the teachings of its parents, could overcome these difficulties.
One possible plot could be that Naruto and Fuu initially struggle to balance their ninja duties and new parenthood. Naruto might be away on important missions, leaving Fuu to take care of the baby most of the time. But they gradually learn to support each other more. Fuu could teach the baby some of her unique abilities from her clan, while Naruto imparts his values of hard work and never giving up. Eventually, their baby grows up to be a strong and kind - hearted ninja, bridging the gap between different ninja clans.
A possible plot could involve Hinata going into early labor. She's scared but tries to be strong for the baby. Naruto is at a crucial point in a diplomatic mission for the village. He has to make a tough choice between staying for the mission's success or leaving immediately for Hinata. In the end, he decides to go to Hinata and with the combined efforts of the medical ninja in the village, they welcome their new baby.