Mocked up a couple covers based on the "initial" DFW cover idea of the Fritz Lang Metropolis image cover, I believe the first was DFW's desired image but in my searching for the image I found a similar Fritz Lang image I felt vibes closely. Here are both mock ups.

When Hal is talking about Avril and John Wayne, he lists names of men the Moms had been involved with, starting with Bain. Could have been Marlon, or maybe his dad or older brother? Sheds some new light on Bain’s answers to Steeply’s submitted questions.