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.
In the fanfiction, the Avengers' relationships would shift. Normally, they are a cohesive team, but Spider - Man's death could create fractures. Thor might become more withdrawn as he mourns, and this could make communication within the team difficult. Black Widow would likely try to hold the team together, but she'd be struggling with her own emotions too. Their power dynamics could also change as some members become more aggressive in seeking justice for Spider - Man.
The character dynamics would change a lot. For example, Iron Man might see Spider - Man as a protege in this fanfiction. He could be more protective and try to mentor Spider - Man. Meanwhile, Thor might find Spider - Man's small - scale heroics amusing compared to his own grand battles. Hulk could be a bit unpredictable around Spider - Man, either scaring him or having an odd friendship develop.
They often react with shock and grief. Some might immediately go into a rage, seeking revenge on whoever caused Spider - Man's death. Others may be paralyzed by the sudden loss, unable to function for a while.
Spider - Man would probably be shocked at first. He looks up to the Avengers and being kidnapped by them would be the last thing he expects. He'd likely try to talk his way out, using his quick wit and charm. He might start by asking why they're doing this and try to convince them that they've made a mistake.
Spider - Man would be very confused. He would feel betrayed because he thought the Avengers were heroes he could trust. He could start by asking them why they are doing this. If they don't give him a satisfactory answer, he might try to escape in a sneaky way, using his spider - like abilities to find a weakness in their capture setup while still trying to reason with them.
Spider - Man would probably be defensive at first. He's used to working alone most of the time, and being interrogated by the Avengers would seem unfair to him. He might crack some jokes to ease the tension, but also firmly state that he's a hero too.
The team dynamics would depend on the situation. In a combat situation, Spider - Man could use his spider - sense to detect threats early and alert the Avengers. He could then use his web - slinging to quickly get in and out of danger, while the Avengers engage the main threats directly. For example, if they were facing a group of powerful robots, Spider - Man could web up some of the smaller ones and disable them, while Iron Man fires his repulsors at the bigger ones, Captain America commands the overall battle, and Thor smashes any remaining threats with his hammer. Off the battlefield, Spider - Man might be a bit in awe of the Avengers at first, but as time goes on, he could become more of an equal and contribute his own unique perspective on hero - related matters.
Some fans would be very shocked. They are used to seeing Spider - Man as a friendly neighborhood hero and an ally of the Avengers. If he were to hurt them, it would be like a betrayal of the image they have of him. They might feel angry at the character for a while until the story unfolds more and explains his actions.
They would probably have a range of reactions. Some might be entertained, while others would be more critical. Stark might joke about the science in it not being as good as his own tech.
The Avengers would be very concerned. Captain America would immediately take charge of the situation, trying to keep everyone calm while they assess Spider - Man's injuries. Iron Man would start scanning for the best way to treat him, using his high - tech equipment. Thor might offer some of his Asgardian knowledge of healing, if there was any. Black Widow and Hawkeye would be on guard, making sure there were no further threats while the team focused on Spider - Man.
In the fanfiction, the Avengers would likely be devastated. Captain America might feel a sense of guilt for not protecting Spider - Man better. Iron Man could be filled with rage and vow to take revenge on whoever was responsible. Thor would probably be solemn and use his strength to seek justice. Overall, their reactions would be a mix of grief, anger, and determination.