Perhaps he'd meet a different Hokage. One who has led the village in a completely different way than in his own dimension. Naruto could learn a great deal from this Hokage about leadership and different ways to protect the village.
In the alternate dimension, Naruto could find that the Akatsuki are actually the protectors of the villages. This would completely change his view of the world. He would have to re - evaluate his ideas about good and evil and decide whether to help them or oppose them depending on their true motives.
She might run into a group of rebels. If the alternate dimension has some sort of oppressive regime, there are likely to be rebels fighting against it. Amy could get involved with their cause and help them in their struggle.
He could meet an alternate version of himself. This Naruto might have made different choices in life, like choosing not to pursue being a Hokage. It would be interesting to see how they interact.
She could meet an alternate version of herself. This other Amy Rose might have different values or goals.
In this fanfiction, Naruto might run into Arthas Menethil before he fully turned into the Lich King. It would be a very different kind of encounter compared to what he's used to in his own world. He could also meet Uther the Lightbringer. Uther might be curious about Naruto's unwavering will and Naruto could be in awe of Uther's connection to the Light. Additionally, he could meet many of the adventurers and common folk in Azeroth, each with their own stories and skills.
He could meet some new and powerful shinobi who have different fighting styles compared to those in the Hidden Leaf. For example, some shinobi who are experts in wind - based jutsus that are unique to the western regions.
Naruto might meet a wise alien sage who has knowledge about a different type of energy that could enhance Naruto's own powers. This encounter could lead to Naruto's growth and development in new and unexpected ways. He could also meet some friendly space creatures that help him on his journey through space.
He could meet a strict teacher who doesn't understand his unruly ways at first. Maybe a shy student who he befriends and helps come out of their shell. And there might be a rival student who challenges Naruto in various aspects like grades or popularity.
He might meet a powerful demon king who initially sees Naruto as an intruder but later realizes his good intentions. There could also be a young demon who is curious about Naruto and helps him navigate the land.
She might encounter strange creatures. For example, in many alternate dimension stories, there are unique beings that don't exist in our world. Maybe she'll meet a talking animal or a floating jelly - like entity.