By now, almost every MCU fan has grown accustomed to seeing these two screenshots from the latest "Civil War" trailer (which was epic).
The question, "who is in the chamber?" has been a hot topic in recent weeks. The most we know is: it can't be Bucky because we see the metal arm. So who is it? A possible studio slip on IMDB may explain who is inside that glass chamber.
Everyone, meet Heidi Moneymaker, a recurring stunt double for Scarlett Johansson.
Since the first Avengers film, Heidi has acted as Black Widow in action sequences. For the first time, however, Heidi is shown to be playing the role of "Super Soldier 3" on the IMDB cast list for "Civil War." This is a very strange coincidence. It's possible that she is introduced as a new character, but she is also already listed as Johansson's double in the film. This leads me to one conclusion. Black Widow becomes a super soldier. Since we know Black Widow has sided with Iron Man in the conflict, I wouldn't be surprised if Tony would like to even the odds a bit by getting a super soldier on his team; since Team Cap already has two (Cap and Bucky). The chamber shown in the fight scene between Tony, Cap, and Bucky is the same out of which Bucky emerges earlier in the trailer. There may be some connection between that chamber and becoming enhanced with abilities, leading me to think that the scene where we see Bucky in the chamber is a flashback to when he first became Winter Soldier. When shown in the screenshot below, Bucky has that really dark aura present during his introduction in "Winter Soldier."
Stark has a habit of digging up old technology and innovating it, so I would not be surprised if he got his hands on the chamber used to enhance Bucky and modified it to use on Black Widow. The more I think about it, the less far-fetched this theory becomes.
What do you think? Did the "Civil War" cast list just make a big reveal in a little way? Who do you think is in the chamber?