sherloques:

Captain America: The Winter Soldier Audio Commentary:

“You think
Pierce’s come down and the assassin is here to kill him, but the reversal is
he’s here for instructions. This sort of structure, where someone comes in to a
place thinking they’ll be alone and somebody is already there, happens 3 times
in the movie. It is slightly symbolic of the fact that HYDRA’s been there all
along. Fury’s there when Steve comes in, Winter Soldier is here, and Fury’s
there again later in the cave.”