think that, as far as teaser posters go, the one above is pretty good. You can’t see any character detail, but it sets up the dark atmosphere and shows clearly enough that they are ready to fight.
But, I really like the previous teaser poster for this film much more.
This one sends chills through my spine. The helmet pierced by the, well, thing, conveys a sense of deep darkness and of raging war in a way that the new poster can’t approach. It’s also a much more memorable and iconic image. I hate the look of the title, but it’s an otherwise a very powerful poster.