A masked criminal who dresses like a giant bat terrorizes the guests at an old house rented by a mystery writer.
William Cameron Menzies
Mary Roberts Rinehart
George Marion Jr.
Hal C. Kern
Bill Finger, they further developed the concept. Finger himself said on more than one occasion that Kane did indeed create a version of the character before Finger got involved with the project. Kane was inspired by the flying machine of Leonardo Da Vinci, a movie he had seen called The Bat and of course, Bela Lugosi's 1931 film Dracula which featured a "man-bat" in its opening credits.