The first portion of the reel features Cap getting into an elevator at what appears to be S.H.I.E.L.D. headquarters. He's in his full S.H.I.E.L.D. style uniform, and as other agents board the elevator at different floors, Cap notices one guy sweating, another's hand sort of hanging near his holster, and so on. Something is wrong, and after the lift is full of agents (including Frank Grillo's Crossbones), he says, "Before we do this, does anyone want to get out?" Then a full-on fight breaks out, with Cap greatly outnumbered and seemingly beaten from the moment it starts -- headlocked, pinned, and getting hit with electrically charged stun sticks. One of his hands is pinned to the wall by a magnetic handcuff, but Cap still fights off his attackers with his remaining available hand. It's all quickly cut and edgy type stuff, less superhero-ish than Bourne.
From there we see a series of vignettes, including Cap meeting with Robert Redford's mysterious S.H.I.E.L.D. higher-up, who tells the hero that the black and white morality of the World War II era is long gone. Nick Fury similarly seems to be warning Cap to watch out for himself. Anthony Mackie's Falcon appears, flying and shooting as he soars, and Black Widow is also pulling some Black Widow action, dropping down a long chamber on wires and blasting away at bad guys as she goes. A helicarrier crashes into the water, crumbling on impact, and the reel closes with a shot of Cap's shield stuck in the ground. A metallic hand reaches for it, picks it up, and the camera tilts up to reveal… Sebastian Stan as the Winter Soldier.