New Image of Chris Evans In “The Avengers

“The Avengers” will be seen through the eyes of Captain America:

So much of [The Avengers] story takes place from Steve Rogers’ perspective, since he’s the guy who just woke up and sees this weird-ass world. Everyone else has been living in it. He’s the guy that feels that sense of loss. [The Avengers] is very much about people who are alone — because I’m writing it. [Captain America] is kind of the ultimate loner in that way. There is an anachronism to him, and Chris and I have always tried to, without making it goofy or too obvious, make him that same grounded ’40s Steve Rogers he was in the other movie.

As for the rest of “The Avengers” assembling:

You get them in a world, the world of S.H.I.E.L.D., where they fit in. And you say upfront, these are monsters. These are freaks. These are not you and me, and what are they doing here? How are they human beings? Let’s just investigate that.
                                                                              - Joss Whedon