Over the last week, we have seen plenty of set photos for Captain America: Civil War and they gave us our first looks at a majority of the cast on set. These photos gave us our first peak at the Crossbones costume that Brock Rumlow will wear after recovering from the fight with Falcon in Captain America: The Winter Soldier.
The first set of Crossbones photos were without Frank Grillo and instead had his stunt double inside the suit. Thanks to Just Jared, that has changed as of today as Grillo has officially arrived on the set of Captain America: Civil War.
Based off of early set photos, rumors, and the official synopsis, it appears that Captain America, Falcon (Anthony Mackie), Scarlet Witch (Elizabeth Olsen), and Black Widow (Scarlett Johansson) will go to a small marketplace to stop a potential threat that may end up being a trap set by Crossbones that will lead to a lot of destruction and death. If this is the case, and it is just speculation on my part as of right now, this would seem to be the event that would kick off the Civil War story in the Marvel Cinematic Universe.
Source: Just Jared