The upcoming “Monarch: Legacy of Monsters” prequel on Apple TV has added three new members to the cast. Variety has confirmed that Corey Stoll (“Imperfect Women,” “Appropriate,” “Billions”), Ralph Inneson (“The Witch,” “The Fantastic Four: First Steps”) and Nyasha Hatendi (“Agatha Christie’s The Seven Dials,” “Casual”) will appear in the new series, which was originally
