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.
Captain America might feel a bit uncomfortable. He is a man of high moral standards and if the fanfiction goes against his values, he would be perturbed. He could be thinking 'This is not how things should be depicted.' However, if it shows his comradeship with the team in a positive light, he might appreciate it.
Spider - Man, being the youngest of the group, would be really excited. He would love seeing all the different versions of the Avengers' story. He might even get some inspiration from the fanfiction for his own heroic deeds. He could exclaim 'This is so cool! There are so many ways our story can be told!'
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.
The Avengers' reactions to Endgame fanfiction would vary greatly. Natasha Romanoff might be intrigued by the different relationships and storylines presented in the fanfiction. Bruce Banner would probably approach it from a scientific and analytical perspective, trying to understand the logic (or lack thereof) in the fictional scenarios. Clint Barton might be more focused on how his character is depicted, especially in relation to his family.
Captain America could have a more determined look. In fanfiction, he would likely see the trailer as a call to action, a chance to rally the team even more. He'd probably think about how to boost the morale of the Avengers and the rest of the world. His reaction would be about inspiring hope in the face of such a seemingly hopeless preview.
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.
Batman would likely be very cautious around the Avengers at first. He'd be observing their tactics and technology. Thor, on the other hand, might be curious about the Justice League's powers, especially Superman's strength. He might challenge Superman to a friendly test of strength.
Hulk and Percy could have an interesting interaction. Hulk's brute strength and Percy's agility and water powers could make for a great dynamic. They might start off by having a little test of strength, but then realize they need to work together. And when it comes to Captain America, he and Percy could bond over their sense of duty and loyalty. Cap would probably respect Percy's commitment to protecting his world, just as Percy would admire Cap's leadership.
One highly regarded story is 'The New Beginning' which explores what happens after the events of Endgame in a really unique way. It delves deep into the characters' emotions and how they cope with the new world they're in. Another great one is 'Beyond the Snap' which focuses on the alternate timelines that could have been created during the events of the movie. It's really interesting to see how the author plays with the concepts from the movie.
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.
Well, different characters would likely have different reactions. Those who are close to Lelouche in the original story might feel a sense of nostalgia or a new understanding of their relationship with him. For example, if Suzaku were to watch Lelouche fanfiction, he might be conflicted as he has such a complex relationship with Lelouche in the original. He could be intrigued by the fan - created scenarios that show a different side of their bond.