The main characters would typically include the original characters (OCs) created by the fanfiction writers. These could be new Autobots or Decepticons with their own names, abilities, and personalities. Alongside them, of course, might be some of the well - known Transformers from the 2007 movie, like Optimus Prime or Megatron, who interact with the OCs in various ways.
I'm not an expert in anime or movies, and I don't have enough information to answer this question. However, according to what I know about the Transformers plot, the scene of the fight between Prime and Megatron on the moon is not a plot of an anime or movie, but a plot of a Transformers comic or novel. In the Transformers comics and novels, Prime and Megatron often fought on different planets, some of which even involved the moon.
Well, Iron Man and Ratchet might start off on the wrong foot. Iron Man, with his cocky attitude, might try to show off his tech to Ratchet, who would be unimpressed and critical of Stark's technology in comparison to Cybertronian tech. But they could later come to respect each other's skills.
They could have a range of reactions. Naruto would likely be excited and eager to see new stories about his world. He loves adventures and would be interested in seeing different takes on his life.
The characters in 'httyd' would likely have complex reactions to the future in the fanfiction. Hiccup, for example, has always been a forward - thinking character. He would likely be intrigued by the possibilities the future holds, whether it's in terms of dragon - human relations or new inventions. However, he would also be concerned about protecting his tribe and the dragons. Astrid would be more practical. She would assess the potential threats and benefits. The dragons themselves, such as Toothless, would react based on their bond with their human counterparts. If they sense that Hiccup is positive about the future, they might be more open to it, but if there are signs of danger, they would be on high alert.
The younger characters in Encanto like Antonio would be excited. He loves stories and new ideas, so Mirabel fanfiction would be like a new adventure for him. He might want to share it with his animal friends. And Dolores, with her ability to hear everything, might already know about the fanfiction. She could be either intrigued or a bit worried depending on how the fanfiction is being received by the rest of the village. If it's causing a stir, she might be concerned about the family's reputation, but if it's positive, she would likely be quietly supportive.
Optimus Prime is usually a very popular character in these crossovers. Whether it's the version from Transformers Prime with his more stoic and wise demeanor or the Bayverse Optimus who has his own charm with his action - packed movie presence.