‘Marvel’s The Avengers’ is action-packed comic book fun

This is the movie moment comic fans have been waiting for

In the last several years, the spate of new-to-the-mainstream superhero movies may well have left you fumbling to remember your Iron Man from your Watchmen, your Green Lantern from your Green Hornet. And now, the fan-tastic notion of Marvel throwing together six of its heroes in a single movie, “The Avengers,” has you reeling as though you’ve just taken a haymaker from the Hulk. Here, then, is a breakdown to help you keep it all straight, so that when the group’s signature rallying cry goes out -- “Avengers Assemble!” -- you’ll know who’s doing the assembling. By Tom Russo.