In the new horror movie “Opus,” we are introduced to Alfred Moretti, the biggest pop star of the ’90s, with 38 No_ 1 hits and albums as big as “Thriller,” “Hotel California” and “Nebraska.”

Alfred Moretti was the most dominant pop star of the ‘90s, a reclusive, technopop legend that reached David Bowie-level fame and created a cult-like following. But that was then. Now Moretti (John Malkovich),