Sometimes, a new villain could know Natasha's age and taunt the Avengers with it, forcing them to investigate and find out the truth for themselves.
The Avengers could find out who Spiderman is in fanfiction when they encounter a piece of advanced technology that can unmask his secret. Or maybe there's a betrayal within the superhero group and someone spills the beans on Spiderman's identity.
In many of these fanfictions, Natasha's character is explored through her vulnerability when she's sick. For example, in some stories, we see her usual tough exterior crack, revealing her fear and dependence on her team mates, which is a side of her we don't often see in the movies.
Peter is young and idealistic, while Natasha is more world - weary. In fanfiction, this can create an interesting dynamic. Peter's enthusiasm can sometimes rub off on Natasha, making her remember the reasons she became an Avenger in the first place. For example, Peter might be excited about a new technology they are using on a mission, and his excitement can make Natasha see things in a new light.
They could react with surprise. After all, Peter is still young. But then they would likely be happy for him. Maybe they'd offer to take MJ out for a nice dinner to get to know her better.
The Avengers could find out who Spider-Man is in fanfiction by a trusted insider accidentally spilling the beans. Or perhaps a villain uses this knowledge to manipulate the situation and forces the truth to come out.
In many fanfictions, the Avengers' reactions vary. Tony Stark might be proud, like he's found a protege. He'd probably start upgrading Peter's suit right away. Captain America, on the other hand, would be more concerned about Peter's moral compass and whether he's ready to be a full - fledged Avenger. Hulk might not care much at first, but once he sees Peter's strength, he could become his ally. Overall, it's a mix of different emotions and actions.
The Avengers as a whole would probably start to work with Daredevil more closely. They would realize that his blindness doesn't make him any less of a hero. They would also learn from his unique fighting style which is adapted to his lack of sight, and they might incorporate some of his techniques into their own combat strategies.
Bruce would probably be more analytical. He might wonder how Tony's marriage could affect his work and the team. He could also be curious about Tony's relationship dynamics. Meanwhile, Wanda might sense the emotions involved, like Tony's happiness or any underlying stress in the relationship. And Rhodey would likely be supportive, since he's Tony's close friend. He might even help Tony deal with any potential issues that come up with the Avengers' reactions.
They might be shocked and confused. It could lead to a lot of internal conflict and soul-searching among the team.
First, they would need to figure out if it was a trap. But assuming it's not, they could divide into teams. One team, like Ant - Man and Wasp, could infiltrate the place in a stealthy way. Meanwhile, Doctor Strange could use his magic to create illusions and misdirect the captors. The Avengers would have to work together, combining their different powers and strategies to rescue Natasha successfully.