Yes, there could potentially be such a fanfiction in the vast world of fan - created content. Fanfiction often takes characters from different universes and creates unique and unexpected relationships between them.
Sure. Shao Kahn is a major character in the Mortal Kombat story. He is the emperor of Outworld. He is often portrayed as a powerful and ruthless dictator, constantly trying to conquer other realms, especially Earthrealm. His actions drive much of the conflict in the Mortal Kombat universe as various heroes rise up to oppose his tyrannical rule.
I haven't come across a fanfiction with that premise yet. Naruto and Shao Kahn come from very different fictional worlds with their own distinct rules, powers, and cultures. The idea of Naruto being Shao Kahn's grandson is a very strange and unexpected one. It would require a lot of creativity to blend the two worlds together in a way that makes sense in a fanfiction. Maybe it exists in some niche corner of the internet, but it's not something that pops up frequently in general fanfiction discussions.
If Naruto is trained by Shao Kahn in fanfiction, it would be a wild mix of two different fictional universes. Naruto, who is used to the shinobi way of life, would be exposed to Shao Kahn's world of Outworld. Shao Kahn could introduce Naruto to more aggressive and perhaps darker forms of combat. This might change Naruto's personality a bit, making him more of a no - nonsense fighter. Also, Naruto might learn some new ways to enhance his physical strength, which could be a great addition to his existing skills.
The plot could involve Naruto being trained in the ways of Outworld combat in addition to his ninja training. Since Shao Kahn is a powerful and feared ruler, Naruto might be expected to be a great warrior. There could be a conflict where Naruto has to choose between the values he learned in his ninja village and the more brutal values of Outworld. For example, he may have to decide whether to follow Shao Kahn's orders to conquer other realms or stay true to his own sense of justice.
One interesting crossover could be Shao Kahn's invasion of the Naruto world. Picture Shao Kahn's Outworld forces clashing with the ninja villages. Naruto and his friends would have to use their unique jutsu against Shao Kahn's powerful magic and brute strength. Maybe Naruto's Rasengan could be a counter to some of Shao Kahn's energy attacks.
Shao Kahn would likely be seen as an extremely powerful and feared villain in the Naruto fanfiction world. His physical strength and magical abilities would make him a huge threat. He could be adapted as an enemy who is after the tailed - beasts' power, similar to how other villains in Naruto are attracted to that power.