Star Wars Rogue One's first teaser was just released, check it out:
So, that was awesome, even though it was short as hell, it shows that Rogue One is gonna truly explore the time before A New Hope, and with it being released, everyone received a truly big nerdgasm.
Shadow Troopers? Or Death Troopers?
Shadow Troopers are well known in the SW Legends mythos, but as they are no longer canon we thought they would be canonized again in this film, while the design of the actual stormtrooper we saw in the teaser, is like nothing we've seen before, and rumours say they are called Death Troopers, like the troopers in the novel of the same name, who don't seem like zombies, so...cool name, though.