Disney and Lucasfilm have released a boatload of new goodies for Rogue One: A Star Wars Story during the film’s panel at the ‘Star Wars Celebration” in London.

The new 4:23 trailer offers a behind-the-scenes look at the making of the new film. A new poster depicts the Rebel and Imperial forces in combat on the planet glimpsed in the previous pictures (see “First Images from 'Rogue One: A Star Wars Story'”).

The film opens in theaters on December 16.