Why did "Supergirl" tank at the box office?
The movie did open at #1 but wound up only grossing $14.3 million in North America. So was it simply bad word of mouth or viewer apathy based on the lukewarm response of Superman III the year prior.
Also, the film was originally going to be Warner Bros. big summer release of the year, but they dumped to Tri-Star, who released (in America, it was released in the UK in July) it in November of '84.