Billy Batson Magic of Shazam: Mr Who? Mr Atom! (DC Comics)

With the help of two sentient cockroaches, the villain Dr Sivana has recently escaped from Fawcett City Penitentiary. The mad scientist unleashes robotic mayhem on the city of Fawcett, but he needs more power to finish his hostile takeover...and it seems that Captain marvel and Mary Marvel might be just what the doctor ordered!