He could have a lot of adventures. For example, he might be amazed by modern technology like smartphones and cars. He could use his ninja skills in modern sports and become a star athlete. Also, he might get involved in modern-day battles against villains who use advanced weapons, and his ninja techniques would give him an edge.
They might have adventures like exploring ancient ruins. Naruto's enthusiasm and Tsunade's wisdom would be a great combination. They could discover long - lost jutsu or artifacts that could change the shinobi world. For example, they might find a scroll that contains a powerful sealing technique that was thought to be lost. Along the way, Naruto could also learn more about medical ninjutsu from Tsunade, which would enhance his skills as a well - rounded shinobi.
He could have adventures trading with different villages. Maybe he'd discover rare ninja tools in a small, remote village and have to haggle with the local merchants to get a good deal. Then he'd bring those tools back to Konoha and sell them at a profit, all while facing rivals who are jealous of his new business.
He could be on a mission to protect the Hidden Leaf from a new and powerful enemy. Maybe he has to travel to far - off lands and use his enhanced skills, like his Rasengan, in new and creative ways.
They might encounter a group of bandits. Sasuke would use his Sharingan to quickly assess the situation and his combat skills to fight them off. Sakura would be right beside him, using her medical ninjutsu to heal any minor wounds they get during the fight.
He could go on rescue missions. For example, if a villager is in trouble in a far - off place, Naruto could quickly drive his car there. His car might be modified with some ninja - like features, like a hidden compartment for his shurikens and kunais.
They might have adventures in a world full of advanced magic technology. For example, they could encounter new spells that are created in the future to deal with different threats. They may also meet their descendants and learn about how their actions in the past have influenced the future generations.
Well, Naruto could bring his unique sense of justice to Fairy Tail. Since he has always been about protecting his friends and village, he would likely jump into any situation in Fairy Tail where the guild or its members are in danger. His Rasengan could be a very powerful attack against the various foes in the Fairy Tail world. And he could learn some magic from the Fairy Tail wizards too, like how to control magical elements which would be a whole new experience for him.
Naruto could potentially find some ancient ninja artifacts on the deserted island. These artifacts could hold great power or knowledge. He would then have to figure out how to use or protect them. There could also be some sort of mystery on the island, like a hidden cave with strange markings. Naruto, being the curious and adventurous type, would surely try to solve the mystery. This could lead to him learning new jutsu or uncovering secrets about the ninja world's past.
An adventure where they have to stop an evil force that is threatening both of their worlds. Naruto could bring his knowledge of sealing jutsu to prevent the evil from spreading, and Noire could use her leadership skills to gather allies.
They could have an adventure where Kakashi has to protect baby Naruto from some low - level bandits. Kakashi would use his Sharingan to quickly assess the situation and his lightning - style jutsu to fend them off while making sure baby Naruto is safe.