Of the top movies of the early 1990s, Ghost may have been the biggest that nobody talks about anymore. Think about it: it was the second highest-grossing film of 1990 (behind only Home Alone) and yet you’d be hard-pressed to find someone who could name a scene outside of the sensual pottery sequence. Hell, can you even give a rundown of the plot? But this was the film that your parents were going to see in theaters or renting, proving an immediate topic of the pop culture water cooler. Yet, this was far from being anticipated, as even star Demi Moore figured Ghost could have been a huge bust.

While noting that her most recent film The Substance had potential to either find its audience or flop, Demi Moore said, “I felt that way also about Ghost because it had so many different genres mixed together that, truly, I thought,...