>>10974928It's a couple things.
I've always liked Flash as a character, and him being the person who bullied Peter Parker but was Spider-Man's #1 fan was a really fun dynamic.
So it's sort of an extension of that. What happens when you bond a symbiote that hates Spider-Man to Spider-Man's #1 fan?
Not to mention the relationship between him and the symbiote is written so incredibly well with Flash trying to fight the urges the symbiote makes him want to give into, and also trying to handle it like an addiction with it giving him his legs back and letting him act like his favorite hero, while the symbiote starts coming around to him and they form a really good relationship as he eventually treats it more like a partner and it doesn't want to leave him anymore.
Plus, Remender is a fantastic writer and gives him a really good arch enemy with Jack-O-Lantern, completely revamping him into a big deal.