Jeff Spokes, the artist of that large Dawn of DC promotional image posted some singles in his Insta and among them was one of Hal. What's interesting is that in the published version, Hal has the green shoulders. (the logo in the final also has a more dimensional circle around it rather than a simple line, but that's neither here nor there) It's also interesting that his mask has the little points on it, resembling the floating mask in the "Green Arrow" cover - which caused many to conjecture was a reference to Parallax.