Crossbones (Brock Rumlow) is a fictional character, a supervillain in the Marvel Comics universe. He was created by writer Mark Gruenwald and artist Kieron Dwyer in Captain America #359-360 (1989).
Part of the Marvel Cinematic Universe’s success is their close adaptation and homage to the source material. Characters and stories from Marvel Comics are wisely adapted into the MCU by its filmmakers ...