In Disney's "Mary Poppins Returns," an all new sequel with a fresh sensibility that celebrates the spirit of the original, Mary Poppins is back to help the next generation of the Banks family find the joy and wonder missing in their lives. Emily Blunt ("The Girl on the Train," "Into the Woods") stars as the practically-perfect nanny with unique magical skills who can turn any task into an unforgettable, fantastic adventure and Lin-Manuel Miranda ("Hamilton," "Moana") plays her friend Jack, an optimistic street lamplighter who helps bring light and life to the streets of London….