There's been precious little information available about Rogue One: A Star Wars Story, save for that promo image that's used in every single article about the film. That one right there. Well, now we have some info from an extra working on the film, as well as some trooper helmets and a rumor about Ben Mendelsohn's villain.
According to /Film (link below), actor Donnie Yen posted a picture of these helmets online a few weeks ago and it was quickly deleted. Now the picture has resurfaced along with some info as to what those helmets flanking the traditional Stormtrooper are all about. First up, the light brown helmet on the right...
It is a combination of a Scout Trooper (Biker Scout) with Stormtrooper parts. On set they were called “Sandtroopers.” It has a lot of soft parts like a Scout Trooper including similar chest armor, but more narrow around the hips. It has the same kneepad as the classic Sandtrooper. It has some accent of color like dark red on a panel.
As for that black helmet on the left, that one's a little more interesting...
The other helmet has already been the subject of much discussion and debate. Previous reports have spoken of “Death Troopers,” specially trained Stormtroopers with black armor who, as their name implies, mean serious business. According to Making Star Wars, their armor is all black, with green lights positioned in a few areas that give them some menacing contrast: The green lights look really cool against the black armor. When casting the Death Troopers they were looking for actors around 6’3? so they’re pretty big (TFA Stormtroopers are 5’10” for comparison).
Scottish supermodel Eunice Olumide did some work as a featured extra on the film and details her experience a bit, including what it's like being scanned by Lucasfilm so they can make toys of your character...
I did a small feature in Star Wars Rogue One. That was a really awesome experience. I don’t have lines but it was an incredible experience to be part of such an iconic film. I was originally supposed to play a nomad, but since I’m athletic I ended up playing a rebellion leader.
I did not get any lines, but I got to wear this really outlandish costume and run through a bar while a tank comes after us. The about 20 stormtroopers pile out and there’s lots of explosions. I have this sort of mushroom on my head.
If my scene gets cut or not cut I was entered into the George Lucas Archives. I got into a 3D scanner and they did a scan. They scan all the characters so they can reproduce individual toys or computer games. I will be a toy. It was an amazing experience.
The final tidbit should be taken with a huge grain of salt since Hasbro has officially denied showcasing any of their upcoming Rogue One toys to the public, but a dude in Germany posted about having seen prototypes for the figures, including the one played by Ben Mendelsohn (above)...
Rogue One 6" Black Series were shown. Main heroine, main antagonist (looks like Admiral Thrawn, but without blue skin. Black droid (Assuming RO).
ANH Leia and TFA C-3PO.
If there is truth to this, then we can assume that the character he’s describing as looking like Admiral Thrawn is probablyBen Mendelsohn‘s mysterious villain, who has been previously described as being a flashy dresser.
For a bit more detail on Mendelsohn's character, head over to Making Star Wars for a rumor about his "flamboyant" new addition to ranks of Star Wars villains.