The brewing tuner adaptation of “American Psycho” has found its creative team, with Duncan Sheik penning music and lyrics and scribe Roberto Aguirre-Sacasa writing the book.Based on the 1991 Bret Easton Ellis novel that centers on a Wall Street banker who’s also a serial killer, “American Psycho” incorporates multiple references to the popular music of the 1980s, the era in which the story is set. Producers have said they expect the original score to share that ’80s flavor. Sheik nabbed a 2007 Tony as the composer of “Spring Awakening.” He’s also at work on legit projects including “Nero” and “Whisper House,” which recently opened at the Old Globe in San Diego. Aguirre-Sacasa, a writer on HBO skein “Big Love,” has penned plays including “Based on a Totally True Story,” “Good Boys and True” and “Dark Matters.” “Psycho” was previously adapted into a 2000 Lionsgate pic toplined by Christian Bale. Tuner is the first stage offering from the Johnson-Roessler Co., the shingle that paired former MGM senior exec David Johnson and former MGM TV exec Craig Roessler. The pair produce with Jesse Singer for Johnson-Roessler, along with the Collective’s Aaron Ray and XYZ Films’ Nate Bolotin. Ellis and Edward R. Pressman are consulting producers. No production timeline for the developing musical has yet been nailed down.