Avengers has always been my #1 comic since I started collecting back in the 70s. Back then, in the 70s and 80s, I never even dreamed about an Avengers movie or any other superhero movie, because the *very* few that were out there (Superman movies, short-lived Spidey live-action TV show, Bixby's Hulk, and Shazam!) had such laughable fx and costumes that I figured it was just simply a genre that would never translate to film. (And yes, I include Donner's Superman films in that statement. The fx were horrifically behind the times in an age when Lucas & Spielberg were absolutely revolutionizing the industry.)
Then after Burton's Batman in '89, I started having *hopes* for an Avengers movie someday, but I figured Marvel was way behind the times and fighting a losing battle against DC movies and TV....hell, they had even started the ball rolling on plans for a Justice League movie. But Marvel was mired in bankruptcy, and they sold off their film rights piecemeal to dozens of different studios, which meant that the lawyers would never let the characters share a film universe.
By the time X-Men came out, I realized that Avengers had a much greater shot. The golden age of Marvel Movies had begun, and X-Men and FF proved that ensemble pieces worked just fine 'n' dandy. As Marvel continued to launch Spidey, X-Men, Daredevil, Elektra, FF, Ghost Rider and Iron Man, with many more scheduled/rumored to be in development by 2008, I knew it was just a matter of time before Marvel turned to one of their top titles --- Avengers.
I knew, like most of you, that Avengers was inevitable since Avi announced it back in '05. The only thing that's surprised me is that it's taken 7 years to get to film.