We haven't seen any photos from the Captain America: Civil War set in Atlanta for the past few weeks, with production presumably moving to an indoor setting at Pinewood Studios. It seems that may be changing since two new images surfaced yesterday, featuring Anthony Mackie out of costume, as he leaves his trailer, and a mysterious new setting that could mean a surprising plot twist different than what is in the comic books. The photo showcases the exterior of a building known as the Institute for Infectious Diseases, or IFID, which raises some questions about the story. It's possible that the movie features some sort of viral disease, perhaps unleashed by the villainous Baron Zemo (Daniel Brühl). But for now, we don't have much to go on.

It's also possible that this facility could be a secret S.H.I.E.L.D. base that Captain America is using as he prepares to battle Iron Man (Robert Downey Jr.), but we don't know that for certain either. All we know about the plot is that Captain America and Iron Man find themselves opposing one another over the superhero registration act. The sequel also stars Scarlett Johansson (Black Widow), Sebastian Stan (The Winter Soldier), Paul Bettany (Vision), Jeremy Renner (Hawkeye), Don Cheadle (War Machine) and Elizabeth Olsen reprising their roles from Avengers: Age of Ultron.

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Other cast members include Chadwick Boseman making his debut as Black Panther, Emily VanCamp as Agent 13, Frank Grillo as Crossbones, William Hurt as General Thaddeus Ross and Martin Freeman in an unspecified role. Do you think this Institute for Infectious Diseases photo hints that there will be a viral plague unleashed in Captain America: Civil War? Check out the photos and chime in with your theories.