Kort sagt: Han är ett multi-billionaire geni och har källor, men här är vad den officiella personen som arbetade på filmen sa:
Och från geektyrant :
So how exactly did Stark know about Peter Parker, a.k.a. Spider-Man? During an interview with ComicBook.com Markus offered a pretty cool explanation.
"I think he's been keeping tabs. I think he might know about everybody." I imagine when he says “everybody” it also means the characters in the Netflix series like Daredevil, Jessica Jones, Luke Cage, Iron Fist and The Punisher. I mean, how can he not know about those guys, right?
Han fortsatte:
"Tony has A.I. somewhere running crime statistics. He can see where it's going up and heroes might be needed and where it's going down and there might be heroes. It's why he built Ultron in the first place."
Liknande uttalande ges på cinemablend också.