After history is rewritten by the Flash, radically different versions of Captain Marvel and his family are introduced. Darla Dudley along with her five friends Billy Batson, Pedro Peña, Eugene Choi, Freddy Freeman, Mary Batson, and pet cat Tawky Tawny are trapped in a subway car that transports them to the Rock of Eternity. There they meet the wizard Shazam who grants each of the children with a different one of the wizard’s attributes. Darla Dudley, due to her natural athletic abilities, is given the speed of Mercury.
By saying the word “Shazam” together, the six children possess the collective ability to turn into Captain Thunder, this timeline’s version of Captain Marvel.