Bob Iger debuted a sneak peek of Rogue One: A Star Wars Story during the Disney Holiday Special tonight on ABC. The trailer showed a bunch of new footage as well as new dialogue.
https://youtu.be/h3rhXOFLfWg
I think we can assume Krennic is having a heated conversation with Darth Vader during the trailer. Rogue One hits theaters in 21 days!
