First, there was an idea. While press surrounding 2008’s Iron Man brought up the notion of an Avengers movie as a possibility, Marvel Studios president Kevin Feige downplayed it a bit, noting that these first few movies had to work in order to get to The Avengers. Well, they worked. And they worked considerably well. Iron Man was a huge success; Iron Man 2 was a huge financial success; and Thor and Captain America: The First Avenger launched franchises for new heroes. Only The Incredible Hulk felt like something of a failure, but even then it was quickly brushed …