Well, Naruto getting Meliodas' power in a fanfic would change a lot. Naruto is already a strong ninja, but with Meliodas' power, he could probably fly around the Hidden Leaf Village like it's no big deal. His combat style would be a wild mix. Meliodas has a very aggressive and acrobatic fighting style. Naruto might start fighting more like that. And his chakra control could be enhanced. He could use Meliodas' power to sense enemies from far away, like Meliodas can sense other demons. It would be a really interesting combination of two very different power systems.
If Naruto had Meliodas' power in a fanfiction, he would become extremely powerful. Meliodas' power includes things like his superhuman strength, speed, and his ability to use the Demon powers. Naruto could use this to enhance his own ninja skills. For example, his Rasengan could be charged with Meliodas' demonic energy, making it much more destructive. He might also be able to use some of Meliodas' sword skills in combat, giving him an edge against tough opponents like Sasuke or Madara.
One possible plot could be that Naruto somehow gets the powers of Meliodas. He might start using Meliodas' sword techniques along with his own ninja skills. For example, he could combine the Rasengan with Meliodas' Full Counter move. And he may also inherit Meliodas' personality traits like his laid - back yet determined nature, which could lead to some interesting interactions with his friends in the Naruto universe.
In such a fanfiction, Naruto might start to reshape the ninja world entirely. He could create new jutsus that are unimaginable with normal power limits. He could also travel to different dimensions effortlessly to learn more about the secrets of chakra and ninjutsu, and then bring back that knowledge to improve the lives of everyone in his own world.
He could become a super - powerful being. The Power Morpher might give him abilities that are beyond his wildest dreams. For example, flight. Naruto has always been limited to moving around on the ground or by using his ninja skills to jump and climb. With the Morpher, he could soar through the skies, which would give him a huge advantage in battles and also in scouting out enemy locations.
A possible plot could start with Naruto being transported to the world of the Seven Deadly Sins. There, he discovers his connection to Meliodas. They initially have some misunderstandings due to their different upbringings. But as they get to know each other, they realize they are brothers. Together, they embark on a journey to find their long - lost family and along the way, face various challenges from the demons and other antagonists in the Seven Deadly Sins world, all while Naruto tries to adapt to this new and strange world.
In this fanfiction, the council's demand for Naruto's power might be the starting point for a whole new adventure. Naruto could be forced to go on the run to protect his power. Along the way, he might discover new aspects of his power or even meet new allies who help him understand the importance of his power and why the council wants it. Maybe he'll also find out that there are some dark secrets behind the council's demand, which could lead to a major showdown between him and the council in the end.
Well, Naruto could use Loki's power of illusion in really interesting ways. He might be able to create false landscapes to mislead his enemies during battles. For example, he could make it seem like there are a thousand clones when there are only a few real ones. This would give him an edge in combat as his opponents would be confused and waste their energy attacking the illusions.
Well, in this kind of fanfiction, Naruto might glare at Sirzechs' power out of jealousy. Maybe Naruto, being used to his own strong powers in his own universe, is suddenly faced with Sirzechs' overwhelming power and it makes him feel a bit insecure. So he glares as a sign of his internal struggle with the new power dynamic he's facing.
Naruto's story would change drastically. He'd be more OP (over - powered). His fights would be over quicker. For example, against Pain, he could just use Meliodas' power to one - shot him. His relationships might change too. Some might be afraid of his new power. Others might try to use him.
One possible plot could be that Naruto and Meliodas are brought to a strange new world together. They start off as rivals, each thinking their own way of fighting and protecting is superior. Naruto with his ninjutsu and Meliodas with his demon powers. But as they face common enemies in this new world, like some powerful dark magic - using villains, they gradually learn from each other. Naruto might teach Meliodas about the importance of friendship and teamwork in the way he values his comrades in Konoha. And Meliodas could show Naruto some unique combat techniques using his sword skills and demon forms. Eventually, they become friends and combine their powers to defeat the big bad and save the new world.
Yes, there are likely fanfictions out there with such a concept. Fanfiction writers often come up with creative and unexpected crossovers like this. You can search on popular fanfiction websites such as Archive of Our Own or FanFiction.net to find stories based on this idea.