He was co-writer with Jim Uhls (Fight Club) the screenplay to the shelved Destroyer film adaptation for Sony, to be directed by Shane Black (Lethal Weapon, Iron Man 3).
The first Destroyer novel to which Mullaney contributed was #88: The Ultimate Death; he then went on to become the sole writer of the series for issues #111-131.
Sony Pictures has announced[2] that Mullaney has been hired, along with Jim Uhls, to co-write the script for a new Destroyer movie,[3] which is currently in development.
The Red Menace is an adventure series centering on Patrick "Podge" Becket, a retired communist-fighter and secret agent from the 1950s who returns to crime-fighting in the 1970s, aided by his friend and partner Dr. Thaddeus Wainwright.
Mullaney's second series surrounds the comic adventures of private investigator Crag Banyon; the first book, One Horse Open Slay was published on December 13, 2011 to positive reviews.