Star Wars: Rogue One - 13 Things You Missed In The Teaser Trailer
12. Crashed X-Wing
Given it's placement in the trailer, it's fairly obvious why this one is easy to miss. It comes in the same shot as Donnie Yen's being surrounded by a bunch of Stormtroopers, and subsequently kicking a*s, so it's not intended to be the focus. But if you do look again, in the background of this scene you'll see what is clearly a crashed X-wing.
We know there are going to be plenty of X-wings in this movie, but it's interesting to see that one has crashed on this planet, and that it probably didn't end well for the pilot (likely arrested rather than dead). It's a shot that helps establish the tone and stakes of this as much more of a war movie.