Well, Naruto would probably be really confused at first. He comes from a world of ninjas and chakra, and The Last of Us is a post - apocalyptic world full of infected and survival struggles. But being Naruto, he'd also be curious. He might be shocked by the violence and the desolate nature of the world in the fanfiction. He'd likely try to find some way to bring hope to the characters, like he always does in his own world.
Naruto's reaction to The Last of Us fanfiction would be complex. On one hand, he'd be fascinated by the different kind of world - building. He is used to his own world with different villages and ninja clans, and this post - apocalyptic world would be a whole new concept for him. He might be a bit horrified at the idea of the infected and how they spread. However, his optimistic nature would make him look for the good in the story. He'd see the relationships between the characters in the fanfiction and be reminded of his own bonds with Sasuke, Sakura, and the rest of his friends. And he'd probably end up rooting for the main characters to succeed in their survival and their mission, whatever it may be.
She would be furious and immediately start looking for Dina.
Well, Naruto's ability to create shadow clones could be a huge advantage in The Last of Us setting. He could send clones to scout areas full of infected without putting himself in too much danger. Inversely, Joel's marksmanship could be a new skill in Naruto's world. Maybe he could teach some of the ninja how to use guns if guns were to exist in that world.
They might be shocked at first. In the fanfiction, there could be a lot of dark and unexpected plot twists. For example, if their relationships are depicted in a different way or if there are new threats they have to face. They'd probably start by discussing among themselves what they just read, trying to figure out if it has any real meaning or if it's just a wild interpretation of their world.
He would probably be quite amused by some of his past antics. For example, his constant pranks on Iruka-sensei. But at the same time, he'd also see the pain he carried from not having his parents and realize how that influenced his actions. He might react with a bit of regret for some of the stupid things he did out of loneliness, but also be glad that those experiences made him who he is today.
Naruto would probably be both amazed and a bit scared at first. But being Naruto, he would quickly jump into action. He might try to use his rasengan against Godzilla, thinking it could do some damage. However, he would soon realize that Godzilla is much more powerful than he initially thought and would have to come up with a different strategy, like using his speed to avoid Godzilla's attacks and find its weak points.
He might be really surprised. Naruto is used to his own world and the fanfiction could show things he never imagined. For example, if the fanfiction has his kids achieving great things in new ways, he'd be proud yet a bit shocked at how creative fans can be.
He might be shocked at how the village has developed. In some fanfictions, the village could have advanced technology. Naruto, being from a more traditional ninja world, would likely be both amazed and a bit confused at first.
He might be shocked at first. In fanfiction, the future could be full of unexpected changes. He could be excited to see how his friends and the village have developed. Maybe he'd be a bit sad if things didn't turn out as he hoped for his loved ones.
Naruto's reaction would vary greatly. For stories that show his growth in new and interesting ways, he could be inspired. He might think about how he could apply some of the ideas in his real ninja training. But if there are fanfictions that are too far - fetched, he might scratch his head and wonder what the author was thinking. And if there are ones that play with his emotions in a way that's too intense, he might need some time to process it all.
It could start with a strange event that transports a character from one world to the other. For example, Nathan Drake could be exploring an ancient site and accidentally open a portal that sends him into The Last of Us' post - apocalyptic world. Or, it could start with a shared threat. Maybe a new, more powerful group of bad guys is causing trouble in both universes, and the characters from both series have to work together to stop them.