Marvel has released a new image from Captain America: The First Avenger as well as showing a little footage from the imminent first trailer for the film.  Separately, neither is mind blowing, although if you must see Captain America throw his star-spangled shield, then you'll want to check out the footage from Entertainment Tonight's preview piece for the trailer they'll be showing tonight.

Hit the jump to check out the image and the clip.  Captain America: The First Avenger stars Chris Evans, Hayley Atwell, Tommy Lee Jones, Sebastian Stan, Toby Jones, Stanley Tucci, and Hugo Weaving.  It opens in 3D on July 22nd.

UPDATE 1: With a sneak peek at the trailer.

UPDATE 2: Another portion of the trailer has been released.

Image via Marvel; The first video (a sneak peek at the trailer) via Twitvid and the second video via SHH.

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Trailer sneak peek 1

Trailer sneak peek 2

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Here's the full (if blurry) Entertainment Tonight sneak peak [via Comic Book Movie]:

Here’s the official synopsis for Captain America: The First Avenger:

Marvel Studios’ Kevin Feige will produce CAPTAIN AMERICA: THE FIRST AVENGER. Alan Fine, Stan Lee, David Maisel and Louis D’Esposito will executive produce. The film will be released in the US on July 22, 2011 and distributed by Paramount Pictures.

CAPTAIN AMERICA: THE FIRST AVENGER will focus on the early days of the Marvel Universe when Steve Rogers volunteers to participate in an experimental program that turns him into the Super Soldier known as Captain America.

Born during the Great Depression, Steve Rogers grew up a frail youth in a poor family. Horrified by the newsreel footage of the Nazis in Europe, Rogers was inspired to enlist in the army. However, because of his frailty and sickness, he was rejected. Overhearing the boy’s earnest plea, General Chester Phillips offered Rogers the opportunity to take part in a special experiment… Operation: Rebirth. After weeks of tests, Rogers was at last administered the Super-Solider Serum and bombarded by “vita-rays.” Steve Rogers emerged from the treatment with a body as perfect as a body can be and still be human. Rogers was then put through an intensive physical and tactical training program. Three months later, he was given his first assignment as Captain America. Armed with his indestructible shield and battle savvy, Captain America has continued his war against evil both as a sentinel of liberty and as leader of the Avengers.