In the Shazam! mid-credits scene, Dr. Sivana, who is now depowered after Billy Batson seized the Eye of Envy from him and trapped the Seven Deadly Sins back within it, was shown in prison obsessively scrawling runes on the walls in a desperate attempt to get back to the Rock of Eternity. He then hears a voice telling him that there are other ways to obtain powers, and that by teaming up together, the two of them could rule the “seven realms.” This voice belongs to the diminutive, yet sinister Mister Mind, the super intelligent worm who was seen in 1974 being held in a glass case at the Rock of Eternity, but had escaped his confinement by the time Billy Batson showing up there, breaking free after Sivana became possessed by the Seven Deadly Sins, which led to quite the kerfuffle in the wizard’s lair.