It could be Iron Man. Since he was always the brains behind a lot of the Avengers' tech and strategies, he might be the one analyzing every detail in the trailer and coming up with plans.
In this fanfiction, perhaps the Avengers are watching the trailer together in the Avengers compound. They might start arguing about whether the events in the trailer are going to be good or bad for their world. Some could be excited to see old foes return, thinking it's a chance to set things right, while others might be worried about the chaos it could bring to the already fragile multiverse. For example, Iron Man could be analyzing the technology shown in the trailer, trying to figure out if it's something they can use or need to defend against.
Imagine the Avengers reading 'No Way Home' fanfiction. Loki would probably find it amusing and start plotting his own fanfiction - like twists in his head. Wanda Maximoff might be a bit emotional about it, relating to the characters' feelings in the story. Vision, on the other hand, would be trying to understand the concept of fanfiction itself and then make logical deductions about the Avengers' reactions based on their personalities.
Well, if the Avengers are watching 'Spider - Man: No Way Home' fanfiction, they might be looking for inspiration. Maybe they want to learn from the different scenarios presented in the fanfiction to better prepare for future threats in their own world. They could also be amused by the wild ideas and crossovers that often appear in fanfiction.
One interesting plotline could be the Avengers having to deal with alternate versions of themselves that are brought into their universe during the events of No Way Home. It could lead to some really cool team - up and fight scenes.
There's a fanfiction where the Avengers watch 'No Way Home' and it really focuses on how Doctor Strange's actions in the movie inspire Wanda Maximoff to further explore her powers. She sees how Strange manipulates the multiverse and starts to think about how she could do something similar with her chaos magic. It's a great read for seeing Wanda's character grow in new ways.
A really interesting fanfiction could be where the Avengers view the events of 'No Way Home' from a different dimension. They see Peter's struggles and decide to intervene in a more creative way. Maybe they use their connections across the multiverse to find a solution that doesn't involve as much danger for Peter. Some fanfictions also explore the emotional reactions of the Avengers to seeing Peter go through so much in this movie.
Well, the Avengers could have a whole range of reactions. For instance, Tony Stark might be analyzing the science behind the events in 'No Way Home' and thinking of ways to use or improve it. Captain America could be more focused on the moral implications of bringing back the villains and how they are being dealt with. Thor might just be enjoying the chaos and action, seeing it as a great spectacle.
Tony Stark could also be a key figure in some fanfics, even though he's no longer alive in the main MCU timeline. His intellect and previous experiences with multiversal - related events (like in Endgame) could be explored in the fanfic. Maybe the Avengers find a way to access his knowledge or even a version of him from another universe to help them out.
Tony could be critical if the fanfic doesn't match his view of technology in the MCU. He might say, 'This fanfic writer needs to study up on Stark Industries' tech a bit more.' Steve, on the other hand, would look for the moral and heroic elements in the story. He'd appreciate any parts that show the Avengers working together selflessly. Thor would love any parts that involve his hammer or his Asgardian heritage. He'd laugh heartily at any humorous takes on his character in the fanfic. Natasha would be looking for strong female character portrayals and any strategic elements in the plot. Clint would be glad if his character has some cool stunts or a key role in the story. And Bruce would be intrigued by how the fanfic deals with the duality of his character, whether it's in a new and interesting way or not.