In Naruto future reaction fanfiction, characters might react to various things. For example, they could react to new jutsu developed in the future. They might be amazed at the power and creativity behind it. Maybe Naruto himself would be excited to see how the next generation has advanced the art of ninjutsu.
A fanfic about Naruto and Hinata's wedding could start with the preparations. Hinata would be shyly picking out her wedding dress with the help of Ino and Sakura. Naruto would be out with Kakashi, getting some last - minute advice on marriage. The day of the wedding arrives, and the whole Hidden Leaf Village is decorated. As they exchange vows, Naruto promises to always protect Hinata and their future family, and Hinata vows to support Naruto in all his dreams, ninja or otherwise.
Well, their wedding could be a unique blend of shinobi and musical elements. Tayuya being a Sound ninja, there might be some amazing musical performances at the wedding. Naruto, with his big heart, would surely invite all his friends from Konoha. The ceremony could take place in a beautiful forest clearing, with Naruto wearing his traditional Konoha ninja gear, but with some fancy touches for the occasion, and Tayuya in a beautiful red and black kimono - the colors of the Sound village.
It might be a small, intimate wedding. Just their closest friends and family. They could choose a beautiful spot in the forest near the village. Naruto would be nervous but excited, and Ino would be beaming. The ceremony would be a mix of traditional ninja elements and some personal touches. For example, instead of rings, they might exchange special ninja tools that have been passed down in their families. And after the ceremony, they would go on a short honeymoon to a nearby hot spring.
Naruto would be devastated. He has always idolized his father, so being betrayed by him would shatter his world. At first, he might be in denial, not wanting to believe that Minato could do such a thing.
He might be really surprised. Some fanfictions could show him in situations he never thought of, like different kinds of friendships or battles. He'd probably be curious about how fans see him and his world.
Naruto could find some similarities between his own values and Batman's. Both are determined to protect their respective worlds. However, the storytelling style in Batman fanfiction might be a new concept for Naruto. He may enjoy the complex characters and the dark, gritty atmosphere often found in Batman stories, or he could be put off by it as it's so different from the more straightforward good - vs - evil in his own world.
Naruto is devastated. He feels a huge void in his heart. Jiraiya was the one who believed in him from the start, and his death makes Naruto question a lot of things. He might even start to doubt his own strength for a while.
There would likely be a lot of negative reactions. Fans of the Naruto series who love the original themes of friendship, heroism, and ninja values would be appalled. The Naruto fandom is quite large and protective of the original spirit of the show, so this kind of fanfic would be seen as a desecration of the characters and the world that has been created.
Naruto would probably be deeply hurt. He values his relationship with Sasuke so much that such a betrayal would shatter him. He might become withdrawn or angry.