Résumé: 1939: The Vigilantes
Bruce Wayne and his "honey," Julie, arrive via private auto-gyro at the Metropolis World's Fair only to be caught in the path of Electrox, a mechanical man on a rampage. Electrox has been taken over by the Ultra-Humanite, a frail old man in a wheelchair who is nevertheless a ruthless criminal mastermind. Just before Julie is crushed, Superman arrives and stops the primitive robot.
1949: Family Matters
A very pregnant Lois Kent has been kidnapped by the Joker, who says that he knows Superman is Clark Kent. Superman bursts in and the Joker opens a lead-lined safe to reveal Kryptonite. Superman is seemingly weakened, but quickly shows he's unaffected and is shot in the back by Lex Luthor. Lex pulls off a mask to reveal the cowled Batman.