Spiderman's age in the Infinity War comic varies depending on the specific storyline and continuity. But generally, he's depicted as a young adult, likely in his late teens or early twenties.
He might also have an emotional reaction. Spiderman is a very empathetic character. If the fanfiction shows some really tragic events during the Infinity War, he could be deeply affected. This could lead to him being more determined to prevent such tragedies from happening in his reality.
It could make him more cautious. After seeing all the chaos in the Infinity War fanfiction, he might be more careful in his actions. He wouldn't want to rush into situations without thinking, like some characters might have done in the fanfiction.
One interesting plotline could be the Avengers trying to reverse the Snap in more creative ways. For example, they might seek out ancient magic that was long forgotten. Another could be the exploration of how the remaining heroes deal with their survivor's guilt on a daily basis. Some fanfictions might also focus on new alliances formed between characters who previously had little interaction.
Definitely Tony Stark. He has always been a fan favorite, and after Infinity War, his guilt and determination to fix things are really interesting to write about. Another popular one is Nebula. Her backstory and her relationship with Thanos make her a complex character that can be explored a lot in fanfiction. And Scarlet Witch is also popular. Her power is so great, and in the post - Infinity War scenario, she could be a key player in either revenge or redemption stories.
One common theme is hope. After the devastation of Infinity War, many fanfics focus on the characters finding hope in the darkest of times. For example, they might find hope in new friendships or in the discovery of new powers.
One great Loki post Infinity War fanfiction could be 'Loki's Redemption'. In this story, Loki, having survived in some unexpected way, tries to make amends for his past wrongs. He starts by helping the remaining Asgardians rebuild. Another one might be 'Loki and the New Order' where he teams up with some unlikely allies in the post - Infinity War chaos to restore balance in the universe. And there's also 'Loki's Hidden Power', which focuses on Loki discovering a new, latent power within himself that could potentially change the fate of the post - Infinity War world.