For a split second, we see Clint Barton teaching a young woman to fire a bow. If you immediately wondered if this is meant to be Kate Bishop, same! In the comics, Kate is the first woman to take on the Hawkeye name and the third person overall. She joins the Young Avengers and is given the code name Hawkeye by Captain America. Why would Steve be the one to hand down the name? Because Clint Barton is dead.
However, as these things happen, he's brought back to life sometime after Kate has been using the name for a bit. When he sees how well she does under the code name, and wanting to keep his return on the down-low for a bit, Clint assumes the code name Ronin. You see where this is going, don't you? Clint eventually goes back to using the name Hawkeye, but Kate doesn't want to give it up either, so now there are two Hawkeyes in the Marvel comics.
