If you thought all of Stephen King's works had been adapted already (some of them twice), think again.  His short story "Gramma," appearing in King's 1985 short-story collection "Skeleton Crew," is set to be adapted into the horror feature, Mercy.  The short story centered on a boy left at home to watch over his bed-ridden grandmother, only to come to the realization that Gramma harbored a secret much darker than he could ever have imagined.  Universal has teamed up with Blumhouse Productions for the adaptation. Hit the jump to read up on the reason for the title change, as well as the cast and crew who have signed on so far.

Variety reports that Peter Cornwell (The Haunting in Connecticut) is set to direct Mercy from a Matt Greenberg (1408) script.  Frances O'Connor (A.I.) is attached to star.  The following logline gives the reason for the name change:

"Story follows two young boys who go with their single mother (O'Connor) to take care of their elderly, senile grandmother named Mercy, only to discover that she's a witch who made an evil pact with a dark force many years before."

Personally, I liked "Gramma" better, but it might get people confused with the Guillermo del Toro-produced horror movie, Mama.  Mercy works for me.  And low-budget horror pictures have worked well for Blumhouse as of late, with Paranormal Activity 4 and Sinister both cracking the top ten at the box office.

King's story was a hit in the mid 80s, landing an adaptation on The New Twilight Zone in 1986.  Scripted by Harlan Ellison, Piper Laurie (Carrie) provided some voice-over work for Gramma in the episode.