In the fanfic, if Naruto gets the Jiongu, it could have a huge impact on his relationships. His friends might be a bit wary of this new power at first. But Naruto being Naruto, he would probably find a way to show them that he's still the same person. He could use the Jiongu to protect them better, like creating barriers around them during battles. Also, it could be a factor in how his enemies view him. They might see him as an even greater threat and either target him more or try to avoid him altogether.
The Jiongu could have a connection to Naruto's family that he was unaware of. Maybe it was something that his ancestors had encountered before. This discovery could change his perception of his family's history. Also, the Jiongu might seem like a great power at first, but it could turn out to be a double - edged sword. It could start to drain Naruto's life force or chakra over time, forcing him to find a way to either get rid of it or find a balance.
The fanfic could explore how Sasuke deals with his emotions when Naruto is sick. He might be conflicted between his old rivalry feelings and his newfound, deeper feelings for Naruto. Sasuke could also be the one to stay by Naruto's side when everyone else is busy. He'd watch over Naruto while he sleeps, and when Naruto wakes up, there could be a moment of intense eye - contact that shows the unspoken bond between them.
In this fanfic, Naruto might be tortured for information about the Hidden Leaf. The Akatsuki are known for their ruthless ways, so they could use various jutsu to make him talk.
Maybe the enemy would see Naruto's injury as an opportunity to finish him off. But Naruto has a habit of surprising his foes. Even in his hurt state, he could pull off some unexpected jutsu. His friends could also use this situation to set up a trap for the enemy. For example, they could make it seem like Naruto is more injured than he actually is, luring the enemy into a false sense of security before attacking.
In the 'naruto gets all the tailed beasts fanfic', Naruto's life would change completely. He would no longer be just an ordinary ninja with a lot of potential. Having all the tailed beasts within him means he has access to an unimaginable amount of power. He could potentially unlock new forms or abilities that are a combination of his own and those of the tailed beasts. This could make him a force to be reckoned with not only in his own village but across all the ninja villages. His relationships with his friends might also change. They might look at him with a new sense of awe and respect. And Naruto would have to learn to control this new - found power, which could be a huge challenge in itself. But if he manages it, he could reshape the ninja world in ways no one has ever imagined.
In this fanfic, Naruto might leave Konoha to protect his loved ones from potential threats in the village. When he gets married, it could be to a character like Hinata. They might start a new life in a peaceful place, away from the chaos of ninja battles. Maybe Naruto will teach his children the values he learned on his own journey.
Well, Naruto might use the lightsaber in a very unique way. He could combine his chakra control with the power of the lightsaber. For example, he could infuse his chakra into the lightsaber to make it stronger or to give it new abilities. Maybe he would create some kind of new jutsu that involves the lightsaber. Since Naruto is known for his creative fighting styles, having a lightsaber would just add another dimension to his combat skills.
First of all, Naruto's world is different from the Marvel universe. But if he got all the Infinity Stones, he might use the Power Stone to enhance his already strong Rasengan. Imagine a Rasengan with the power of an entire universe behind it. He could also use the Time Stone to go back in time and prevent some of the tragedies that happened in his own world, like the death of his parents.
He would probably be extremely powerful. Naruto is already a very skilled ninja with his own set of abilities like the Rasengan. A lightsaber would add a whole new dimension to his combat skills. He could combine his chakra control with the lightsaber's unique properties. For example, he might be able to infuse his chakra into the lightsaber to make it even more powerful or use his speed and agility to perform some amazing saber techniques that are a blend of Jedi and ninja styles.
Well, he'd probably try to train it like he trains his ninja skills. Maybe use it in battles against other ninjas or Pokémon trainers in the fanfic world. He might name it something really cool, like 'Summonmon' or something.