Photo-Illustration: Vulture; Photos: Warner Bros./Everett Collection, DC Spoilers for the plot and ending of Supergirl ahead. For the most part, big superhero movies from DC and Marvel tend to be a hodgepodge of adaptation, with filmmakers borrowing freely and nebulously from decades of winding comic-book continuity. The newly-released Supergirl , on the other hand, is a direct adaptation of a single standalone comic series from 2021: Supergirl: Woman of Tomorrow, which also happened to be the