Supergirl may be based on the beloved comic book mini-series, Woman of Tomorrow by Tom King and Bilquis Evely, but there are some big differences in the adaptation. One of the biggest changes is villain Krem of the Yellow Hills, just referred to as Krem in the DCU movie, who looks very different from his comic book counterpart.
While in the novel, the Brigand looks pretty human, as we've seen from the Supergirl trailers, the movie went in a different direction. Krem is covered in facial piercings and loves leather, looking way more Mad Max than the original.