Maybe he'd meet Cisco Ramon. Cisco would be fascinated by Naruto's ninja tools and might even try to reverse - engineer some of them. Naruto, in turn, would be amazed by Cisco's technological inventions.
He could meet the Flash. The Flash would be intrigued by Naruto's speed and his ability to move in bursts, which is somewhat similar to his own super - speed. They could have a friendly race or even team up to fight a common enemy.
Naruto could encounter Caitlin Snow. She might be curious about Naruto's healing abilities and how his chakra can be used for medical purposes. Naruto could also learn about modern medicine from Caitlin and compare it to the medical ninjutsu he knows from his own world.
Perhaps Naruto is transported to Central City and gets mistaken for a super - powered being. He then has to prove himself and his ninja abilities. He could end up teaming with some of the local heroes or vigilantes in Central City, sharing his knowledge of combat and teamwork from his experiences in the ninja world.
Some original characters created specifically for the Central City fanfiction could also become popular. They might be local heroes or anti - heroes, with their own unique powers and personalities that are shaped by the city environment. For example, a character who has the power to manipulate the city's infrastructure like the buildings and sewers for combat or other purposes.
There could be a group of kids on the beach who are inspired by Naruto. They might approach him and ask for autographs or to show them some ninja moves. Naruto would be happy to oblige and in the process, he could discover a new talent among the kids that could be important for the future of the ninja world.
He could meet an AU version of Hinata who is more assertive and outgoing. Maybe she's a powerful ninja in her own right and not as shy as in the original story.
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.
Maybe some local tribespeople who have unique abilities or knowledge. For example, they could teach Naruto some ancient techniques or survival skills that are not known in the Hidden Leaf Village. There might also be wandering samurai or other shinobi from different regions who pass by the outpost and interact with Naruto.
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 may run into some friendly space explorers who are amazed by his ninja skills. They could help him navigate the strange new world of space and introduce him to advanced technologies that are different from what he's used to in the Hidden Leaf Village. There might also be some wise, old beings in space who can teach Naruto new ways to master his chakra.
He could meet the Raikage. The Raikage might be initially skeptical of Naruto but could later see his potential. There are also other strong ninjas in Kumo like Killer Bee. Naruto might cross paths with him and they could have some interesting interactions, perhaps even training together.
He might meet some lone ninjas who live in the wild. These ninjas could have unique skills or knowledge that Naruto can learn from.