If the characters were to watch Avengers fanfiction, they'd probably be quite surprised. Thor might find it strange that in some fanfictions he's made into a more comical figure than he thinks he is. Black Widow, on the other hand, could be interested in how fans explore her backstory in ways that the movies might not have fully delved into.
There's a chance that side characters get more focus too. Maybe characters like Rhodey or Nebula could have more in - depth character development as they react to the events of Endgame while being watched by the Avengers in the fanfiction.
If the Avengers watched Disney fanfiction, it could inspire them in different ways. For example, Tony Stark might get some new ideas for his tech from the imaginative worlds in the fanfictions. Maybe seeing how magic works in a Disney - inspired fanfic could give him some out - of - the - box thinking for his Iron Man suits.
They might find it really strange and funny. Some of them could be amused by the creative interpretations of their characters, while others might be a bit embarrassed by the over - the - top scenarios in the fanfiction.
Often, Tony's character is shown to be complex. When the Avengers watch him fight, we can see his confidence, but also his insecurities. Maybe he's trying to prove himself to the team, especially to characters like Steve who have different values. This creates interesting character interactions and development.
Thor would be a bit more straightforward. He'd probably see the Spider - People as brave warriors. He might be a bit confused at first about the multiverse concept but would quickly accept it. He'd be like 'These small heroes have great courage, much like the warriors of Asgard.' And he might offer to train them if they ever met. He'd also be entertained by the humor in the Spider - Verse, like the interactions between Peter B. Parker and Miles.
Captain America is also a key focus. His leadership qualities are highlighted. He could be seen rallying the other Avengers as they watch the trailer, giving inspiring speeches about not giving up and fighting for the universe.
Some characters might be amused. For example, Iron Man could be like 'Well, this is an interesting take on our story.' He might find the creative interpretations of his character in the fanfiction either entertaining or a bit off - mark.
Definitely the Avengers as a whole. However, some fanfictions might also put a spotlight on Jarvis or Vision. Jarvis was important in the lead - up to Ultron's creation, and Vision was a key part of the solution to the Ultron problem. So, their roles could be expanded and their characters more fully developed in the fanfiction compared to the movie.
In this fanfiction, the Avengers would likely be filled with shock. They might stand there in stunned silence, unable to process what just happened. Their expressions would range from horror to disbelief as they watched their friends and allies turn to dust.