When it comes to Genos' abilities, the Avengers would be intrigued. Genos' ability to fire intense energy blasts could be a great asset in battles. Hawkeye might be thinking about how Genos could provide cover fire or take out tough enemies from a distance. But the Avengers would also be a bit worried about Genos' lack of emotional control at times. In his pursuit of power and revenge, he can be a bit reckless. The Avengers would need to work with him to make sure he doesn't go overboard. Also, Genos' loyalty to Saitama would be something they would need to understand, as it might influence his decisions within the team.
Saitama would be shocked at first. He's used to Genos being around, always eager to learn from him. He might stand there in disbelief for a while.
If Saitama joined the Avengers, it would be a game - changer. His incredible strength could easily defeat most of the villains they face. For example, Thanos might not even be a challenge for him. Saitama's simple - minded but determined personality would also bring a new dynamic to the team. He might not fully understand all the complex superhero politics, but he would just focus on getting the job done, which could inspire the other Avengers to be more straightforward in their approach.
They would probably be very surprised. Some might laugh at the creative ideas in the fanfiction.
The interactions would be quite diverse. Thor might see Saitama as a strange but powerful being. He could offer to have a friendly sparring match, which Saitama might decline because it's too much trouble. Black Widow would likely be trying to figure out Saitama's background and what makes him tick. And Spider - Man would be super excited to meet someone with such incredible power, constantly asking Saitama questions about how he got so strong.
Their dynamics would change a great deal. There would be a lot more tension. Some members might blame themselves or others. For example, Iron Man could be at odds with Captain America if they had different ideas on how to handle the situation. Their usual teamwork might break down as they are all dealing with grief in different ways.
Spider - Man's web - slinging ability can be really useful for the Avengers. He could create webs to trap enemies, which would be a great addition to the Avengers' combat tactics. For example, when fighting against a group of fast - moving enemies like Ultron's drones, his webs can slow them down, giving the other Avengers like Captain America or Black Widow an easier time to take them out.
Iron Man would be angry. He'd probably use his technology to try and track Percy down. He might also start to review all the security protocols to make sure no other traitors could do the same. Thor would be more of the 'let's fight him head - on' type, but the other Avengers would have to hold him back until they have a proper strategy.
The Avengers would initially be in shock when they find out Peter is sick. Clint Barton would be the one to keep a calm head and start organizing things. Wanda Maximoff would try to use her powers to ease Peter's pain if possible. Vision would use his vast knowledge to try and find a solution. They would all be very concerned and do everything they can to make Peter better, from getting the best medical help to providing a safe and comfortable environment for him to recover.
The Avengers might react in different ways. Steve Rogers would probably be polite but firm in getting to know Peter's boyfriend. He'd want to ensure that he was a good influence on Peter. Thor, on the other hand, might be a bit more boisterous. He could either be really friendly and enthusiastic, or his loud and powerful presence might accidentally scare the boyfriend a bit.
The Avengers as a whole would likely be outraged at the idea of someone being abused. Captain America would lead the charge in trying to bring the abusers to justice. The team would come together to not only protect the reader physically but also help them heal emotionally. They would surround the reader with love and support, showing them that there are good people in the world who will fight for them.