Thor would probably be the most enthusiastic. He'd see it as a great honor that the Midgardians (humans) are so invested in his story and his character. He might even want to join in on the fun and start coming up with his own ideas for fanfiction, thinking it's a great way to further his legend among the people.
They could be shocked. The Avengers characters are so iconic, and their actors brought them to life. Some of the fanfiction might be really far - fetched, like making Hulk into a ballet dancer or something. The actors would be like 'Whoa, that's not what I expected!'
In this fanfiction, some Avengers might be in shock. For example, Captain America could be deeply saddened, his belief in justice and protecting the world shaken. He might feel a sense of failure for not being able to prevent the Snap.
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.
The other Avengers would be devastated. Iron Man, for instance, might feel guilty as if he could have done something more to protect Spiderman. He might become more withdrawn and focus even more on creating better technology to prevent such tragedies in the future.
Steve Rogers, on the other hand, would be a bit more diplomatic. He might not fully understand the concept of fanfiction at first, but he'd respect the creativity of the fans. He could say that while it's not the 'official' story, it shows how much people love Thor and the Avengers. He might even find some of the stories that highlight Thor's heroic side inspiring for his own leadership.
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.
Well, Tony Stark would probably be intrigued and start making sarcastic remarks about the plot or the characters. He might say something like 'These RWBY characters are quite the bunch, but their tech could use some of my upgrades!'. Steve Rogers, on the other hand, would be more diplomatic. He'd try to understand the themes and values in the fanfiction and might comment on the courage of the RWBY heroes. Thor would be a bit confused at first, but then find some similarities between the RWBY world and Asgard, like the epic battles and the sense of honor among the warriors.
Well, Steve Rogers might be a bit confused at first. He's from a different era and fanfiction is a very modern concept. But he'd probably be polite about it and say something like 'It's interesting to see how fans imagine different scenarios with Yelena.' Tony Stark, on the other hand, would likely be more intrigued. He might chuckle and say 'This is some creative stuff. I wonder what else they come up with about Yelena.' And Thor would probably just be like 'This is a strange Midgardian thing, but if it makes people happy, then so be it.'
Tony Stark would likely find it hilarious. He'd probably be the first one to start making jokes about it. He might say 'Oh, Hawkeye, you've got some really creative fans out there. I should hire them to write my memoirs!'. As for Hulk, he probably wouldn't care much. He might just grunt and go about his business. But if he did read some, he might not understand it very well and get frustrated. Hawkeye himself would probably be embarrassed at first, but then he'd start to see the humor in it and might even enjoy some of the more positive fanfiction about him.
Some Avengers might find the memes in fanfiction hilarious. For example, Tony Stark would probably have a witty comment about how creative the fans are. He might even be inspired to create some tech based on the meme concepts. Steve Rogers, on the other hand, would be a bit more confused at first. But after some explanation, he would start to see the humor in it and might shake his head with a smile. Thor would likely not understand most of it, but would laugh along just to be part of the group.