Naruto could potentially gain allies among the water - based creatures in the Naruto universe. With the trident, he could communicate or form a bond with them. However, he might also draw the ire of those who oppose any form of outside power or interference. There could be ninja clans or groups that believe Naruto having a weapon from another mythology is against the natural order of the ninja world. This could lead to new enemies who would stop at nothing to get rid of Naruto and the trident.
Naruto could face enemies created by those who fear his power. For example, a group of rogue ninja scientists might create super - powered clones or monsters designed to take him down. Also, there could be alien threats similar to the ones Superman faces in his universe. Since Naruto now has Superman - like abilities, he would be on the radar of intergalactic villains. And there might be dark versions of himself, created by dark magic or some evil jutsu, that have the same powers but an evil intent.
Naruto might initially struggle with the power of the Trident. Since he's used to his chakra system, the magic or divine power of the Trident would be something new. He could start by accidentally activating some of its basic powers, like creating small whirlpools or summoning small sea creatures. As he spends more time with it, he would learn to control it better, maybe even combining his own ninja techniques with the Trident's power, like using the Rasengan while channeling the Trident's energy through it.
Well, if Naruto had Poseidon's trident, it would completely change the power dynamics in the Naruto universe. Firstly, the trident is a symbol of great power in Greek mythology. Naruto could use it to control water in ways that are unimaginable in the Naruto world. He might be able to create massive tidal waves to defend Konoha or use water to enhance his already existing jutsus. Also, it could potentially give him an edge in battles against powerful foes like Madara or Kaguya. With the trident, Naruto could become an even greater protector of his village and the entire ninja world.
Well, it could be that Poseidon's Trident has been stolen and Naruto is called upon to find it. He teams up with some of Poseidon's loyal servants or maybe even a mermaid or two. Along the way, he uses his ninja skills to track down the thieves. When he finally finds the Trident, he has to face the main villain who stole it. Naruto might use his Rasengan in combination with the power of the Trident to defeat the bad guy and return the Trident to Poseidon.
Allies could include his usual friends like Sasuke and Sakura. Since Naruto has the connection to All Might, they might see him as an even greater leader and support him more strongly. Kakashi could also be an important ally, guiding Naruto on how to combine his newfound 'All Might - like' qualities with his ninja skills. As for enemies, Orochimaru might be interested in Naruto's new power source and try to steal it for his own evil purposes. The Akatsuki could also view Naruto as a major threat now that he has additional power and try to eliminate him.
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.
He might face anti - ghoul organizations. Just like in the Tokyo Ghoul universe, there could be groups dedicated to eradicating ghouls. These groups would see Naruto as a threat even if he was trying to use his powers for good. He could also face other ghouls who are jealous of his unique situation, being a ninja with ghoul powers. They might try to either recruit him or eliminate him.
His friends like Sasuke and Sakura could be his allies. Sasuke might be initially skeptical but then see the potential of Naruto's arcane power in fighting common enemies. As for enemies, Orochimaru could be interested in Naruto's power for his own experiments. He might try to capture Naruto to study and steal his arcane abilities.
He might gain the ability to see chakra in a more detailed way. Since the Rinnegan is known for its enhanced visual perception of chakra, Naruto could use this to his advantage when dealing with Kurama's chakra. He could also potentially use the Rinnegan's power to enter Kurama's mindscape in a new way, maybe with more control and understanding. Another possible ability is to transfer Kurama's chakra to others in a more efficient and controlled manner using the powers of the Rinnegan.
He could gain the ability to become invisible at will. The One Ring has the power of stealth in Tolkien's lore, and this could translate to Naruto being able to sneak up on his enemies undetected. He might also gain the power to influence the minds of others, which would be a huge advantage in negotiations or battles.