Cyberpunk 2077's E3 trailer -- yes, the one with Keanu Reeves -- is without a doubt one of the best trailers we've seen this year so far. It may not have gameplay, but it's top notch entertainment, and really sets the tone for the upcoming role-playing title.
Interestingly, CD Projekt Red has released a behind the scenes look at said trailer, which you can watch above. Seeing the whole thing come together, from concept, to motion capture, to rendering, is pretty impressive. It's kind of crazy how much work can be poured into a clip that's barely four minutes long.