Audiences may have taken a step back in 1979 when Disney released its first PG-rated film, The Black Hole. A science fiction thriller bordering on horror. Produced under the Walt Disney Productions label, it was far from a box office success. This was an era in which Disney box office receipts were lacking. Studio execs at the time saw the shift in audience demographics and there was less of a demand for the fairy tales and fantastical happy endings Disney traditionally offered.
Source：https://www.cbr.com/disney-black-hole-touchstone-pictures/
