Who does Scarlett Johansson play in Mike Flanagan's 'The Exorcist' — first-look photos sees MCU star in new avatar Scarlett Johansson's role in Mike Flanagan’s 'The Exorcist' might be under wraps, but the first-look images may have given an inkling of whom she might be playing. Earlier, the actress' different stills from the upcoming horror film did the rounds. The original 'Exorcist' is based on William Peter Blatty's horror novel and was helme…