Over the weekend, Comic-Con provided film fans with a number of surprises, exclusives and toe-curling geek-out moments, but perhaps nothing compared to Marvel Studios bringing out the cast of 2012's highly anticipated comic crossover blockbuster 'The Avengers.' Now just one question remains for ecstatic superhero fans: What about the Justice League?

The Justice League of America, of course, is the DC Comics equivalent of Marvel's mightiest heroes. But while 'The Avengers' has been building buzz since the premiere of 'Iron Man' back in 2008, the proposed Justice League movie has floundered in development hell despite a world famous line-up of iconic characters including Superman, Batman, Wonder Woman, Green Lantern, Flash and Aquaman, that would seem to be a guaranteed, no-brainer box-office smash.