Batman: Arkham Knight has seen its fair share of trailers and promotional videos, but this live-action look at the game is a bit different.
The idea focuses on the bravery and competence that Batman can, hopefully, inspire in the people around him. If you're doing something great, if you're helping someone, you're being like Batman.
Batman has, in fact, been in your heart the whole time.
It's an effective trailer, catching the feeling of the game rather than the actual gameplay, and uses the music of Nine Inch Nails well. We know what the game looks like; we're well past the point where that's a surprise, and this gives Warner Bros. another way to sell the game's ideas to the player.