Captain America: Civil War - 11 Things Learned From AsiaPop ComiCon Trailer

4. Cap And Bucky And The Secret Base

Two very intriguing seconds of the trailer offer a glimpse ahead in Cap and Bucky's relationship as they team up once more. At the minute, there's something of a plot gap relating to how Bucky ends up back in active service, given his volatile condition and the fact that there's a very real chance that his conditioning might actually bring his demons back out in a shooty, violent sort of way. The answer is probably in the Black Panther sub-plot again, and Bucky's attempt to clear his name by uncovering HYDRA's control of him. He's clearly going to be Enemy Number One since he helped HYDRA destroy SHIELD's targets (and kill Tony Stark's parents), so there has to be some investigation into how HYDRA experimented on him. The two seconds in the trailer that fit in with that plot see Cap and Bucky walking towards a "secret looking base in full superhero attire", suggesting they may embark on a mission to uncover more secrets into their linked past. It wouldn't be at all surprising if Baron Zemo will stand in the way.