Naruto might gain the power to control the density of his body. Just like Ant - Man in the comics and movies, he could make his body really hard when he's small, which would be a great defense against attacks. He could also use this ability to punch with more force when he's small, like a tiny but powerful ninja - ant hybrid.
He would gain the ability to communicate with ants. This would be really useful in the Naruto world. He could use ants to gather intelligence about enemy movements, like which paths the enemy ninja are taking or where they are hiding their traps. The ants could act as his little spies.
Naruto would gain super strength. He could lift extremely heavy objects with ease, like mountains or large buildings in the Naruto world. He would also have super speed, enabling him to move faster than any ninja technique. And of course, he would be able to fly, which is a completely new ability in the Naruto universe.
One of the new abilities Naruto would gain is enhanced stealth. Shadow the Hedgehog is known for being able to move quietly and blend into the shadows. Naruto, as Shadow, could use this ability to surprise his enemies. He could lurk in the shadows, waiting for the perfect moment to strike. Additionally, he might gain the power to levitate or glide short distances. This would add another dimension to his movement in battle, allowing him to quickly change his position in the air and attack from unexpected angles. His sensory abilities might also be enhanced, being able to detect the presence of enemies from a greater distance, much like how Shadow can sense threats in his own world.
He probably gains the ability to control the chakra of the Kyuubi more freely. This could mean enhanced strength, speed, and reflexes. He might also be able to use some of the Kyuubi's unique jutsu like the Tailed Beast Ball. His healing factor could be improved as well, allowing him to recover from injuries faster.
Naruto might gain the power of shikai and bankai. Shikai is the first release of a zanpakuto's power, and bankai is the ultimate form. Naruto, with his determination and strong will, would strive to master these forms. Shikai could give him new attacks and defenses, while bankai could make him an extremely powerful force. For example, his bankai could combine his ninjutsu skills with the zanpakuto's power in a unique and devastating way.
The Sharingan might also give Naruto the ability to enter people's minds, at least to some extent. In the Naruto universe, the Sharingan has been shown to have some mind - related abilities. Naruto could use this to communicate with his friends in a more direct way, or perhaps even to break through genjutsu more easily. And, if he can enter the minds of his enemies, he could gather valuable information about their plans and weaknesses.
Naruto would gain the ability to copy jutsu. With the Sharingan, he could watch an opponent's movements closely and replicate their techniques. This would be a huge advantage for him in battles.
He might gain enhanced senses like better hearing and smell, which are common for hanyous. This would help him in tracking enemies or sensing danger even before it's visible. Also, he could have increased physical strength and speed. His already impressive ninja skills combined with the hanyou powers could make him a formidable fighter in close combat.
Naruto might gain superhuman strength like Kratos. He could easily break through solid rock or lift extremely heavy objects. His speed could also increase, allowing him to move so fast that enemies can barely see him. Maybe he could also have the ability to summon the blades of chaos, which he could use in combat in a unique way, like combining them with his kunai.
Well, if Naruto becomes a Sannin, he would surely gain some amazing new abilities. For one, he could inherit Tsunade's healing abilities. This would be a great addition to his skills as he could not only fight but also heal his comrades on the battlefield. In terms of Jiraiya, Naruto might be able to master more advanced forms of Rasengan, inspired by Jiraiya's own jutsu creativity. And from Orochimaru, he could get a better understanding of the chakra nature and how to manipulate it in more complex ways, like Orochimaru did with his snake - like jutsus.
Naruto could develop the ability to better understand and manipulate the chakra of others. His maturity might give him the wisdom to see the flow of chakra in different ways. Additionally, he may gain the ability to quickly analyze battle situations and come up with more creative solutions due to his increased mental maturity.