His friends would likely be shocked. Shikamaru, for example, would probably be disappointed in Sakura. He might try to comfort Naruto and tell him to think rationally. Choji might be angry on Naruto's behalf and want to confront Sakura. And Sasuke, if he's around, might have a complex reaction. He might feel a strange sense of satisfaction that Naruto is finally seeing Sakura's 'true' side, but also a bit of pity for Naruto.
One possible outcome could be Naruto feeling extremely hurt and betrayed. He might distance himself from Sakura completely. In the context of fanfiction, he could also focus more on his training and his other friendships, like with Shikamaru or Kakashi. He might become more determined to prove himself without Sakura's support.
Their friends' reactions would be quite diverse. For instance, Ino, who was once Sakura's rival, would have a mixed reaction. On one hand, she would be happy for Sakura as they have grown to be friends over the years. On the other hand, she might feel a bit envious. Choji would be excited and would look forward to all the feasts at the wedding. As for Lee, he would be over - the - moon for Naruto and Sakura. He would probably give them some long - winded and passionate speeches about love and friendship.
It could be someone new that the author creates just for the fanfiction, someone Naruto meets during a mission perhaps.
Most fans are likely to be quite shocked and disappointed. Since Naruto and Sakura have a long - established relationship in the original series, seeing Naruto cheat in fanfiction goes against what fans have come to expect. It's like a betrayal of the characters' original personalities.
Their friends would likely be very supportive. Kakashi would probably be proud of them, seeing them take on this new responsibility. Shikamaru might initially be a bit skeptical about how they'd manage it all, but would soon come around and offer his strategic advice on raising the baby. Ino would be excited and offer to help Sakura with baby - related things like shopping for cute clothes. Their friends would see it as a new chapter in Naruto and Sakura's lives and would be there to support them every step of the way.
Sasuke would likely be very conflicted. On one hand, he has his own relationship with Naruto and Sakura. He might initially be angry at Naruto for attacking Sakura. But if he discovers the reasons behind it, he may understand Naruto's actions to some extent.
Iruka sensei would be very proud of Naruto. He has been like a father figure to Naruto, and seeing him get married to Sakura would make him feel like Naruto has truly grown up. As for the other villagers, most of them would be happy as Naruto is a hero. They would see Sakura as a great match for him, someone who can support him and also contribute to the village with her skills.
Sasuke would probably be quite surprised. He might initially be a bit skeptical about Sakura's feelings, thinking it could be some sort of impulse. Shikamaru, being the perceptive one, would likely see the potential for chaos in this new development. He might try to stay out of it at first but keep an eye on how things unfold. Choji would be more focused on the emotional aspect and would hope that Naruto and Sakura can work things out happily.
Naruto would be deeply saddened. He has always hoped for Sasuke and Sakura to be happy together. He might initially try to mediate and get them to work things out, believing that their relationship can be salvaged. He would remind them of the good times and how much they mean to each other.
Well, while I haven't come across such a fanfiction myself, it's not out of the realm of possibility. Fanfiction often takes existing characters and relationships and twists them in unexpected ways. Given the popularity of Naruto, Sasuke, and Sakura, some fans might be interested in exploring this rather unconventional scenario in their creative writing. However, it might also be a subject that some fans would find too far - fetched or against the spirit of the original story.