Gaara could be one of his potential allies. Since they have a history together and Gaara has changed a lot, he might support Naruto. Also, the Raikage might become an ally if Naruto can prove that his intentions are good for the entire ninja world.
Well, in the 'Naruto goes to the Kage Summit' fanfiction, Naruto could be in for a wild ride. He might be representing Konoha in some crucial discussions. There could be political intrigue among the Kages, and Naruto, being Naruto, would probably try to cut through all that and promote unity. He may also show off some new jutsu he has learned to gain the respect of the other Kages.
Jon Snow might be an ally too. He has a good heart and is used to dealing with different cultures and powers. He and Naruto could bond over their shared experiences of leadership and fighting for what's right.
He could meet some space - faring ninjas who have adapted to the space environment. They might have unique chakra powers related to the cosmos.
He could make allies with versions of his own friends from different universes. For instance, a super intelligent Shikamaru from a high - tech universe. Also, Naruto might team up with powerful warriors from universes where the concept of chakra doesn't exist but they have their own forms of energy. Another potential ally could be a female version of himself who has different skills and a unique perspective.
One potential ally could be the younger versions of his existing friends like Sasuke. Even though Sasuke in the past may not be as developed as in Naruto's original timeline, Naruto could still see the potential in him and form an alliance early on.
Definitely, the Akatsuki members who have reformed could be potential allies. They have unique powers and knowledge of the ninja world. Naruto's ability to see the good in people might lead him to recruit some of them. Additionally, the toads from Mount Myoboku could be allies, providing their prophetic knowledge and combat support when needed. And, of course, his old friends from Konoha like Kiba and Choji would come to his aid if the situation called for it.
Maybe there are noble knights in the new world who recognize Naruto's courage and strength. They could form an alliance with him, with Naruto teaching them some stealth and speed techniques from his ninja training, and in return, the knights could offer him protection and knowledge about the new world's politics and social structures. Another potential ally could be a group of outcasts or rebels in the new world. They might be fighting against an unjust regime, and Naruto, with his sense of justice, would naturally side with them. Together, they could plan strategies to overthrow the oppressors, using Naruto's unique skills and the rebels' knowledge of the local terrain and the weaknesses of the regime.
He could make allies with the local magic users if the universe he travels to has a magic system. They might be intrigued by his ninja abilities and see the potential in working together.
There are also the wandering ninja. These are ninja who don't belong to any particular village. They might join forces with Naruto because they understand what it's like to be on the outside. Together, they could form a sort of 'rogue' ninja group.
In this fanfiction, Naruto might find allies among the shinobi who were also wrongly exiled from their own villages. They would share a common bond of being outcasts and would fight together against the system that exiled them. Additionally, there could be some rogue ninja with a sense of justice who believe in Naruto's cause and decide to stand by his side in the war.