Batman Returns (1992)

On Christmas day, Gotham City socialites Tucker and Esther Cobblepot become the parents of a deformed baby boy, Oswald. Disgusted by his appearance and wild demeanor, they confine the baby to a cage and ultimately throw him into the sewer, where he is discovered by a family of penguins underneath the abandoned zoo.

Thirty-three years later, millionaire and philanthropist Max Shreck proposes to build a power plant to supply Gotham with energy, though he is opposed by the mayor. During Shreck’s speech, Gotham comes under attack by a disgraced former circus troupe, the Red Triangle Gang. Though Gotham’s vigilante protector Batman intervenes and manages to fight the criminals off, Shreck is abducted and taken to the sewer, where he meets the gang’s secret leader, Oswald himself, now going by the name “Penguin”. Oswald blackmails Shreck with evidence of his corporate crimes into helping him return to the surface, and he accepts. Meanwhile, Shreck’s secretary, Selina Kyle, discovers that the power plant is actually meant to drain Gotham of its energy, which will bring the city under Shreck’s control, after which Shreck will essentially be untouchable by the authorities. Shreck pushes her out of a window to silence her, but she survives the fall and vows revenge, taking up the mantle of Catwoman.