Marvel's Captain America: Civil War trailer: watch the single best moment, in one GIF

The first trailer for Marvel's Captain America: Civil War has dropped, and it promises a major new conflict in the studio's cinematic universe.

Namely, this one:

Marvel Studios

The Captain America: Civil War trailer fills in more of the movie's plot

Yeah, we've known for a while that Tony Stark (a.k.a. Iron Man) and Steve Rogers (a.k.a. Captain America) would be at odds in this movie, and the trailer confirms that their conflict will arise from a government program meant to somehow "limit" the authority of superheroes.

It makes sense that Tony would be partial to this idea. After all, it was his experimentation that unleashed the threat of Ultron onto the world in Avengers: Age of Ultron. His attempts to get Steve to sign on appear to form the backbone of Civil War.

What's less certain is just why Steve is so hell bent on protecting his old pal Bucky Barnes (formerly the villainous Winter Soldier in the previous Captain America film) from facing any sort of consequences for, y'know, all the evil things he did in the last movie. Sure, he wasn't operating entirely under his own power, but Steve seems convinced that Bucky's left those days behind him based entirely on his word — at least in the trailer.

Hero against hero

The draw of Captain America: Civil War, and the comic book storyline it was based off, is seeing how Marvel's superheroes pick and choose which side of the battle they're on. Superheroes share a common belief in doing good, but each one has a sliding scale and a limit of what "good" and "evil" mean to them. The trailer shows us who sides with Captain America — it's Hawkeye (Jeremy Renner), Scarlet Witch (Elizabeth Olsen), Falcon, and Bucky Barnes:

(Marvel)

On the other side, we see Iron Man and War Machine take on this team. They're joined by Black Panther (Chadwick Boseman). This is Black Panther's debut, and our first look at the costume and his power set (fighting skills, acrobat, enhances strength) as he takes down Bucky:

(Marvel)

Obviously, the full film will add context to all of this (like the real possibility that Bucky faces something worse than a fair trial or something similar), but for now, the Civil War trailer is appropriately tantalizing.

Captain America: Civil War hits theaters on May 6, 2016.

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