Can a brief shot of what may well be a cardboard archery standee from a Bass Pro Shop count as a first look at a superhero? Because if so, here's your first look at Hawkeye!
Yeah, that's it. The bow-and-arrow guy, in the gondola, who didn't think Thor drop-kicking an agent was enough of a reason to warrant shooting him in the leg or something. That's ostensibly Hawkeye.