Apologies for a spoiler tag heavy question, but in Captain America: The Winter Solider:
The leader of the SHIELD strike team, Brock Rumlow, is shown to be a HYDRA counter-agent.
At the end of the movie:
He is fighting Falcon, but is taken out more directly by a falling helicarrier.
At the very end of the movie:
We are implicitly shown a scene where he is being put on a stretcher, heavily injured but presumedly alive.
Is there any reason why they deemed the last scene necessary? Is this character relevant to the Marvel Universe, or does he become relevant at some point?