Yes, an evil cross between Captain America and Black Panther does actually exist - and wouldn't that be cool to see in the Black Panther movie? His early life was devastated by the death of his father at the hands of his mother's lover. Extradited to a Swedish court in order to face trial, his father's murderer walked free on a technicality, leading the Panther to blame the corruption of foreigners for the miscarriage of justice (an attitude that would make him an interesting but controversial inclusion in a modern movie). In response, the young man sought training and vengeance, eventually tracking down his father's murderer in Sweden before brutally executing him. Following this the Panther also served as a police officer in New York City - a job which allowed him to let out his pent-up rage by demonstrating an extreme antipathy towards foreigners and immigrants, a character trait that attracted the attention of the Hate-Monger (who would likely, therefore, have to appear alongside the character in a movie as a kind of mentor). Sculpting the man into the champion of his twisted ideology, Hate-Monger set about wresting Hell's Kitchen from the watch of the Black Panther. Of course, Black Panther is unlikely to be in Hell's Kitchen in his first movie, but that part of American Panther's involvement could be altered to include a visit to Wakanda, having been lied to by the Hate-Monger and told that Black Panther had done something terrible.
