A Nerd's Wet Dream Come True (Tossing an OC into Marvel)

John was an average man. At least that's what he tells himself at night. He lived in a rented apartment in the decent district, a well-paying job, and more student debt than he cared to think about being steadily paid off. Yet he was absolutely miserable. He spent his days living like a zombie, a slave in all but name to corporate.  His only joy these days it seems was reading comics and writing fanfics. SI ones. Choke full of power fantasies and large harems. Yeah, even he had to admit he was a loser. His only redeeming feature seemed to be his photographic memory and the library's worth of comics and books he has read. Yet, when fate took pity on him and had John transported into the Marvel Universe, he was only all too happy to oblige. A second chance to make something of himself. Is he going to finally have the comfortable life he wanted? Will he laze away relying on his past life's knowledge or does he want more this time? Will his ambition and hard work lead to sweet fruits, or will it rot away in the darkness hiding beneath the colorful costumes of the hero's society?   Now with crossovers! Be warned if you don't like to see OCs messing up the timeline or DC and other stuff showing up. I swear I'm not randomly adding stuff and there is a legitimate (as far as comic books and fanfics can be) plot reason why. (I'll be honest, I don't know "cannon" marvel really... I watched some movies and animated series as a kid, but I haven't picked up a comic in years. This is just some light-hearted and casual writing for fun. If there are any errors or something you think would be cool please let me know.) I'm also trying to have multiple main characters so that might be jarring for some people while I switch perspective. Sorry in advance, I'm new at this and idk what I'm doing, advice and feedback gladly welcomed!