First trailer:
https://www.youtube.com/watch?v=uVdV...ature=youtu.be
For those out of the loop of what story this follows, here is my brief summary:
(MCU version and not the comic in which it is based)
After the destruction in Age of Ultron, and the subsequent return and recruitment of the Winter Soldier (Bucky Barnes) a super hero registration act is proposed (the Sokovia Accords are called: Framework for the REGISTRATION and Deployment of Enhanced Individuals)
The MCU has used the Sokovia incident in Age of Ultron as well as Bucky Barnes being the Winter Soldier and basically a former Hydra merc as seen in Cap: Winter Soldier.
Captain America refuses the agreement, Tony Stark supports it. Leading to an Avengers vs Avengers angle and thus Civil War.
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It looks absolutely awesome and much better than Age of Ultron which I feel was ruined by a poor story and failure to take advantage of the things they had to work with.
That end fight sequence between Stark, Cap and Bucky is showing the choreography from Winter Soldier is returning which is only ever great news. They're quickly turning the Captain America movies into the best of the MCU.
Spider Man will make a cameo appearance in this and we'll either get a lead in to Infinity War or Ragnarok in which Thor and Hulk will appear.