Avengers Age of UltronAnother "extended" trailer is available for "Avengers: Age of Ultron," though there's not too much new to see.

The new version is just about 20 seconds longer than the original, and features a bit more footage, including Iron Man blasting some HYDRA soldiers.

There's also a behind-the-scenes snippet posted on Facebook with director Joss Whedon and Kevin Feige, which shows the Avengers filming their scenes.