James Cameron, Sigourney Weaver, Stephen Lang, and Zoe Saldana welcomed fans and screened a whopping 25 MINUTES of footage from Cameron’s new masterpiece, Avatar.  Check out what they all had to say, after the jump.

Sigourney Weaver discusses her reunion with James Cameron, and how excited she is to be a part of this film.

Zoe Saldana talks about the casting process, and working with Sam Worthington in the early stages of production.

Zoe Saldana talks about what it was like to train for her extremely physically demanding role in this film.

James Cameron responds to a question about whether or not Terminator star Michael Biehn could have made it into this film, and why he chose Stephen Lang.

James Cameron announces that this footage will not only be enjoyed by the supergeeks at comic con, but will be screened on digital screens in 3D across the globe, on August 21st!  Get excited, everyone!  This movie is going to be tremendous!