Comicbookmovie.com has some scans of The Avengers movie story book including some new images of the characters and scenes in the film, I have posted some images here and if you follow the link in the spoiler box there are some more images from the film.
The scans that i've linked to are BIG SPOILERS for what i estimate to be the first hour of the film so do not read the text that has been scanned. The images themselves do not give too much away however when seen in conjunction with the text they are also big spoilers.
Last warning only follow the link if you want to have some of the film spoiled.