I'm sure Cole was not the first to use the menacing face as a focal point surrounded by floating faces and figures. Like other comic artists of the day, he was influenced by the cover art that sold pulp fiction, especially in their use of symbolism (e.g., Uncanny Tales and All Detective to name two titles before Mask 1). The interesting thing is post-war, the pulps moved away from this overt abstraction of good and evil, while Cole doubled down on this style. Why not? Designing a cover with faces can be quicker to design than a cover with a staged scene. It's understandable considering the huge number of covers he had to turn in throughout his career. This is not to take anything away from Mask 1, one of the highlights in his career.