A Japanese trailer for the upcoming Rogue One: A Star Wars Story not just features some new footage from the movie, but it also delivers an additional plot detail about the Death Star. More after the jump.

The extra footage shows off more Deathtroopers as well as Captain Cassian Andor (Diego Luna) but the rest is stuff we’ve already seen before. But the most important bit is we see Mon Mothma telling Jyn Erso (Felicity Jones) that they’ve “intercepted an encoded Imperial transmission” about an upcoming “weapons test,”.

Nothing surprising there but Captain Cassian Andor tells her that the message was sent by her father, Galen Erso.

Galen Erso is Jyn’s father, played by Mads Mikkelsen. Here’s also a bit of rumoured info on the character, which now might be true:

Mads Mikkelsen (Galen appears to be his name in the film) is kind of the key to the film in a way. He is a scientist that took over the Geonosian Death Star project. He solved several of the flaws the Empire could not and is sort of a revered person in the Empire for his contributions. However, Mikkelsen’s character is a Robert Oppenheimer-type character. Oppenheimer helped design the atomic bomb only to say, “Now, I am become Death, the destroyer of worlds.” The guilt “Galen” feels for his contributions to the Empire become too much and he defects, attempting to make things right. In order to do this, he enlists the help of his only daughter….

Rogue One is being directed by Gareth Edwards (Godzilla) and stars Felicity Jones, Diego Luna, Ben Mendelsohn, Donnie Yen, Mads Mikkelsen, Alan Tudyk, Riz Ahmed, Jiang Wen and Forest Whitaker.

Rogue One: A Star Wars Story hits 16 December 2016.