Artist Gary Frank concluded his most recent collaboration with writer Geoff Johns on the much anticipated Doomsday Clock. The duo has also worked together on Shazam!, Superman: Secret Origin and Superman and the Legion of Super-Heroes. While Johns is currently focused on Shazam! and Three Jokers, Frank is teasing his next DC project, which may feature Wonder Woman and the Justice Society of America.
Frank shared an uncolored piece of artwork on his Twitter account that appears to highlight Wonder Woman's World World II-era costume. Her skirt has stars on them and her familiar boots can be found on her feet. The artist captioned his post with, "Who loves the classics?"
The reference to the classics is what leads us to the inclusion of the JSA. Scott Snyder and Bryan Hitch collaborated on a story titled "A Brave New World" in Wonder Woman #750 that established Diana as DC's first superhero in its revised timeline. As such, when she saves the life of President Franklin Delano Roosevelt at the 1939 World's Fair in New York City, it inspires Alan Scott to become the first Green Lantern.
Whatever secret project Frank is working on, it could be a continuation of this story thread with the full introduction of the remaining JSA members. DC is releasing Generation Zero on Free Comic Book Day in May, which teases the future of the DC Universe.