The first trailer for Marvel's highly anticipated Captain America sequel, subtitled The Winter Soldier, launched early Thursday after being teased by the studio on Wednesday. Though their latest venture, Thor: The Dark World, hasn't even hit theaters yet, fans have been eagerly awaiting a glimpse at what Cap's been up to since the Battle of New York. We've heard reports that The Winter Soldier (which hits theaters on April 4, 2014, the studio's first Spring release) will draw inspiration from the political thrillers of the 1970's, and be just as much a S.H.I.E.L.D. story as a story featuring Steve Rogers. Nick Fury and Black Widow will appear alongside Cap, who will face off against a man from his past who begins reaping havoc as the Winter Soldier. Here are five things we've learned from our first glimpse at the film in the new trailer...