I have just returned from the London MCM expo, ( it was bobbins), where they had a very proffesional stand for the promotion of the Ultramarines movie. They had images from the gallery on display, a couple of models painted by the eavy metal team and some computers they were getting people to sign up to the site on. They were also showing the teaser.
The main producer was on hand and I did my best to get info out of him. I asked him about who the bad guys would be, but I got nothing. I said a couple of alien names to see if he reacted but nothing. They are really keen that their website, facebook and twitter sites are the only places to gain any info.
The only scrap I got is that the Spacemarine in the trailer is a captain and is the character voiced by John Hurt.
Sorry. I tried.