Uhhhh....
. 10 years ago, the prevailing attitude re: super hero movies was niche genre, good chance to make your money back + a modest profit because of the built in fanbase, but not much beyond that, any success a fluke not inherent to the genre. Spider Man? That was only popular because it was the first time when special fx could put a comic character on screen and NOT have it be inherently silly. The Dark Knight? That was just a really great movie in and of itself- and anyway Batman was already popular with teens and 20-30 year olds because of the 90s animated series. And look at Elektra/Daredevil/Fantastic 4 2/Spawn/The Punisher/Return from Krypton!!! And so on.
That wasn't ten years ago. Marvel noticed they had an uptick in comic sales whenever the concomitant film was released, so hey, why not just keep creative control over our films, do it in house, we'll make our money back, it's basically a very long, very expensive ad for Iron Man that people will pay us to air. Fiege had to fight for the idea of an extended cinematic universe.
15 years ago Marvel didn't even make movies in house, the very idea so preposterous! it's like if the nhl started making movies about hockey history and 15 years later the top five grossing films in a year are sports biopics with nhl head and shoulders above everyone else. Doesn't that sound bat **** insane?! Yet that's the kind of turnaround Kevin Fiege has been a part of, he has been at the helm when super hero movies went from niche break evens to a cultural behemoth bereft of any comparison sibce John Wayne was directing Westerns.
so yeah, i take umbrage with the insinuation that fiege backed into a perfect situation.