One possible plot could be that Naruto, as Sindel's grandson, discovers a hidden prophecy that only he can fulfill. This prophecy might be related to saving both the Naruto universe and the Mortal Kombat universe from a great evil. He would have to travel between the two worlds, learning about his Sindel - related heritage along the way. He might face opposition from some characters in both worlds who are afraid of the change his existence represents. Along the journey, he would make new allies and enemies, and his character would develop as he grapples with his new identity and the great responsibility placed upon him.
The plot could involve Naruto having some special powers inherited from Sindel. Maybe he can use some of her magical abilities along with his ninja skills. For example, he could use Sindel's power of flight in combination with his shadow clone jutsu to create a really unique combat style.
No, in the official Naruto and Mortal Kombat canons, Naruto has no relation to Sindel at all. But fanfiction is a place for wild ideas. Maybe the author of that particular fanfiction had a really strange and interesting dream that led to this idea of Naruto being Sindel's grandson. It might be part of a much larger and complex story within the fanfiction that combines the ninja world of Naruto and the dark, fantastical world of Mortal Kombat.
The plot could be that a strange portal opens up and sucks Naruto into Sindel's world. At first, he is seen as an outsider and is hunted. But as he shows his skills and good heart, Sindel decides to help him find a way back home. Along the way, they face various challenges together.
The plot could involve Naruto exploring the history of his family. Since Hashirama was one of the founders of the village, Naruto might learn secrets about the village's origin that were previously unknown. He could also face challenges from those who oppose his new - found connection to Hashirama, thinking he might gain too much power or influence.
One possible plot could be that Naruto's demon - related powers start to surface unexpectedly. This causes chaos in the village as people fear him. He then sets out to find his true family roots among the demons. Along the way, he meets other demon - like beings who either help or hinder him. He has to learn to control his new powers and also tries to make the village understand that he's still the same Naruto they knew, just with a different background.
Well, in a possible plot, Naruto, as Mifune's grandson, could be trained in the samurai arts secretly. As he grows stronger in these arts, he decides to use them to bridge the gap between the ninja and samurai communities. He might face challenges like convincing the Hidden Leaf Village that the samurai way has value and that they can work together. There could also be a villain who wants to use Naruto's unique position to start a war between the two groups. Naruto would then have to use his ninja skills, samurai training, and his natural leadership to prevent this war and bring peace.
One possible plot could be that Naruto discovers his connection to Anubis later in life. Maybe he starts having strange dreams or visions related to Anubis. This new heritage could give him unique powers, like the ability to control shadows in a more spiritual way, similar to how Anubis is associated with the afterlife. He could use these powers to fight new and more powerful enemies in the Naruto universe.
One possible plot could be that Naruto discovers his true heritage as Madara's grandson gradually. This revelation shakes his world as he has to come to terms with being related to a once - feared enemy.
Well, one possible plot could be that Naruto discovers his connection to Mu in a hidden scroll. Maybe Mu had some long - forgotten powers or knowledge that Naruto then has to learn to use to save the ninja world from a new threat. For example, it could be a threat that only the combined bloodline of Uzumaki (from Naruto) and whatever Mu's family had can defeat.
One possible plot could be that Naruto, as the Hokage, discovers the existence of Madara's grandson. He might initially be wary but then realizes that the grandson has no intention of following in Madara's evil footsteps. Instead, he could be a young ninja with unique abilities who wants to use his powers for good. Naruto then takes it upon himself to train the young boy, passing on his own values and skills.
One possible plot could be that Naruto discovers his relation to Hanzo later in his life. This new knowledge makes him question his place in the ninja world and his own identity. He might then try to learn more about Hanzo's past and the secrets that come with being related to him.