A superhero movie, previously the biggest of all time, has lost its box office crown to a 2026 release that opened with a relatively low $750,000. The film 'Supergirl' is reportedly performing poorly at the box office, with estimated losses ranging from $100 million to $125 million. The exact outcome and ranking of the films are unclear, but it appears that 'Supergirl' had a disappointing opening, earning only $38 million in its first weekend.