I've always been amazed and happily surprised to see that River Tam/Summer Glau is in the foreground in the Serenity movie posters; it confirmed what Joss Whedon final plans for Firefly were and that River was at the center of the story, even if Captain Mal Reynolds was the hero of the show.
Total Film website made a list of the' 40 Greatest Science-Fiction Posters' and Serenity movie poster made the list on 35th place. The rank itself doesn't matter, but the description of the poster is a vibrant homage to Summer Glau.
Representative Of The Film? Bleak and sparse, with emphasis on freaky lady-fighter River and her gun-toting comrades. Couldn’t sum up the movie better if it tried.
Coolest Detail: Summer Glau wielding shiny blades. She doesn’t do it until the movie’s finale, but Serenity promises it’s getting there.
Full article : 40 Greatest Science-Fiction Posters: Serenity (2005) at TotalFilm.com
Serenity HQ movie posters, behind-the-scenes, HD 1080p screencaps in the Gallery.