Insider Charles Murphy published photos from the filming of Sokol and Winter Soldier. At one of them, a participant in the leather jacket is visible. Apparently, he plays a member of some gang. But insider was interested in the drawing on his jacket. As you know, the participants of street gangs mean their belonging to a particular clan. Murphy even increased this image. There you can consider the Red Head of the Demon. Insider suggested that it could be a reference to some of the villages Marvel: Mephisto (as a demon), a red skull (because of the color) or the fashion (a big head and something around).
But in the comments, the readers wrote to him that the most likely option is the villager Ogun from the comic book about Wolverine. As already known, the action will occur, among other things, on Mandripur, where Wolverine spent a lot of time. The Ogun was largely replaced by the Father's superhero, taught martial arts. However, over time, he switched to the side of evil and even tried to break the will of Logan and send him to evil deeds.
Insider calls for not hasty conclusions, but simply take into account the information that appears. Maybe the audience will see a new villain, and maybe it's just an Easter egg for the marvel universe connoisseurs.