☆☆☆☆☆ ★★★★★ Interest in the superhero genre is past its peak—a cause for alarm if you’re James Gunn and Peter Safran, the duo behind the new DC Universe. Gunn’s own Superman (2025) was a success, but that character is so iconic that audiences will largely turn up anyway. Supergirl is a trickier prospect. Originally conceived in the late 1950s simply to attract young girls to comic books, the character suffered a notorious screen flop with the 1984 movie starring Helen Slater.