Perhaps in the fanfic, Naruto turns into a dragon as a result of a forbidden jutsu gone wrong. In his dragon form, he discovers a connection to an ancient dragon spirit that guides him. This spirit could teach him new abilities and knowledge. His friends, like Sasuke and Sakura, would then have to help him figure out how to reverse the transformation or at least learn to live with it. They could go on a journey to find a way to control the dragon within Naruto, facing various challenges along the way, such as other ninja clans who see Naruto's new form as a threat.
The plot could also involve Naruto turning into a dragon as part of a prophecy. In this scenario, the dragon form is seen as a symbol of hope for the ninja world. Naruto, in his dragon form, has to unite different ninja villages. He travels across the land, using his dragon - like powers to communicate with different creatures and gain their support. His dragon form might also have the power to heal the land that has been damaged by years of war. As he does this, he faces opposition from some who fear his new - found power and want to keep the status quo among the ninja villages.
Another plotline could involve Madara's relationships. As a girl, her interactions with other characters, especially those who knew her before the transformation, would change. Maybe there would be some romantic interests that develop in unexpected ways. Her old friends might have a hard time adjusting to the new her, and this could create some interesting character dynamics.
One possible plotline could be that Naruto is constantly shunned and mistreated by the village despite his efforts to protect it. This continuous rejection could gradually turn his heart cold and make him seek revenge. He might start using his powerful jutsu against those who once wronged him, like attacking the Hidden Leaf's leadership.
One possible plotline could be that Minato and Kushina raise Naruto as a normal child in Konoha. Naruto would grow up with their love and guidance, which would significantly change his personality. He might be more confident from the start and not have that intense need to prove himself. Also, Minato could train Naruto personally, and Naruto might inherit his father's skills much earlier, leading to different adventures and battles in the ninja world.
One possible plotline could be that Naruto, as a smart female, uses her newfound intelligence to outwit the Akatsuki. She could come up with brilliant strategies to protect the village and its people, something that might surprise her old friends at first. Another plot could involve her using her intelligence to study and master new jutsus that were previously difficult for Naruto as a male. Maybe she could also use her charm and intelligence to negotiate better treaties between the Hidden Villages.
One possible plotline could be Naruto having to control the power of the Jubbi. He might struggle at first, but with his determination, he gradually learns to harness it for good, like using it to protect the Hidden Leaf Village from a new, powerful enemy.
One possible plotline could be that Naruto finally returns after a long and dangerous mission. Sakura, who has been worried sick, is so overjoyed to see him alive that she impulsively kisses him. Another could be in an alternate universe where Naruto and Sakura are forced to pretend to be a couple for a mission, and during the course of it, real feelings develop and they end up kissing.
One possible plotline could be that Naruto is on a highly dangerous mission alone, perhaps against an extremely powerful and unexpected enemy. He might sacrifice himself to protect his village or his comrades. For example, he could be facing a new type of jinchuriki whose power he underestimated, and in the end, he uses all his strength to seal the enemy away, but at the cost of his own life.
In a Naruto Kurenai pregnant fanfic, the plot could focus on the medical aspects as well. Given the unique world of Naruto with its own medical ninjutsu, it could show how the village's medical team takes care of Kurenai during her pregnancy. Maybe there are some complications that only the special ninja medicine can solve. Additionally, the plot could involve Kurenai training in a different way during her pregnancy to keep her skills sharp but also be safe for the baby. This could lead to her developing new techniques or modifying her old ones. And of course, there could be a sub - plot about the other characters' anticipation of the new addition to the village.
One possible plotline could be that Naruto accidentally uses his fingers in a special jutsu near Sakura and it has an unexpected effect on her chakra. Maybe it disrupts her normal chakra flow momentarily, leading to a situation where Naruto has to help her regain control. This could be a way to deepen their friendship or understanding of each other's powers in the fanfic.
One possible plotline could be Naruto being used as a weapon. Since he has no emotions, he can be easily manipulated. The villains might see him as an opportunity to cause chaos in the village. Another plotline could be Naruto's journey to understand what emotions are. He might observe his friends and wonder why they act the way they do. Maybe he starts to mimic their actions to fit in, but still doesn't truly feel anything.