Tony would probably be extremely hurt. He trusted his team, and betrayal would cut deep. He might initially be in denial, not wanting to believe that his friends could turn on him.
One possible reason could be jealousy. Maybe Tony's intelligence and wealth made some Avengers feel inferior, and over time, that festered into betrayal. For example, if Tony developed a new technology that could potentially overshadow their own abilities, they might feel threatened.
The concept of Tony Stark as a cat in a fanfic can also bring out different aspects of his personality. Cats are often seen as independent, which is a trait that Tony already has. But as a cat, it could be exaggerated. He might be more aloof and choose when and who he wants to interact with among the Avengers. This could create some tension or just more light - hearted moments as the other Avengers try to figure out what the cat - Tony Stark is thinking or wanting.
In a Tony Stark Avengers toy fanfiction, imagine the toys are actually miniaturized versions of the real heroes. Tony Stark's toy is the most advanced. It can repair the other toys when they get damaged. A villain tries to steal the Stark toy to reverse - engineer its technology for evil purposes. The other toys, with the leadership of the Stark toy, must fight to protect themselves and the world from this threat.
Yes, it's possible that Tony Stark, as a character, could be the subject of Avengers fanfiction that he might 'watch' in the sense of being a character within the fictional scenarios written by fans. However, in the official Marvel universe, there's no indication of him actually reading Avengers fanfiction.
Hidden Midgard in a Tony Stark Avengers fanfiction could be a really cool concept. It might be a parallel dimension of Earth that has a connection to Asgard or some other alien realm. Tony Stark, with his curiosity, might be the first to suspect its existence. He could then use his Iron Man suit and all his tech gadgets to find a way to access it. Once there, he might find new allies or enemies, and this discovery could change the course of the Avengers' battles and their overall story.
Well, I really like the fanfiction 'Tony Stark's Ultimate Sacrifice'. It's a heart - wrenching story where Tony has to make a huge sacrifice to save the Avengers and the world. The way it's written really captures the essence of his character. 'Avengers: Tony's Clone Dilemma' is also quite engaging. Here, a clone of Tony is created and the Avengers have to figure out if it's friend or foe. It plays with the idea of identity and loyalty. And 'The Iron Man and the Alien Alliance' is a story where Tony teams up with an alien race to help the Avengers in a fight against a common enemy. It has some really cool alien technology and battle scenes.
It could also be due to emotional turmoil. Tony has lost a lot in his life, like his parents and some of his friends. In the fanfic, if he was faced with a situation that reminded him of those losses or if he had a falling - out with a close ally like Pepper or Rhodey, the emotional shock could be so great that he collapses. He's a man who often keeps his emotions bottled up, and when they finally break through, it could have a physical manifestation like a collapse.
One reason could be that he's frustrated with the leadership or the direction the Avengers are taking in the fanfiction. He might feel his ideas are not being heard.
Well, the other Avengers might rally around him. They could try to find a way to revive him or figure out what caused his collapse. Maybe Bruce Banner uses his scientific knowledge to run tests on Tony.