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Neil Gaiman's short story "The Problem of Susan" mentions a posthumously (for P.L. Travers) published work Mary Poppins Brings in the Dawn, in which Mary Poppins was Jesus's nanny and was therefore herself not part of God's creation.
Mary Poppins appears in the third League of Extraordinary Gentlemen graphic novel, in the Black Dossier when it returns to Margaret Cavendish's Blazing World. She later reappears in Century: 2009, where she defeats the Antichrist created by Oliver Haddo. In this appearance, she and other characters hint that she may be a personification of God.
In the short story "El problema de la pequeña cliente," (The Problem of the Little Client) a Sherlock Holmes pastiche by Spanish writer Alberto López Aroca, included in the volume "Nadie lo sabrá nunca," (2005, ISBN 978-84-609-7429-1) the detective of Baker Street is hired by a little girl to find her missing nurse, Mary Poppins. In the story, set in Cherry Tree Lane, Bert also appears.
In a sequence of the Opening Ceremony of the London 2012 Olympic Games a small army of Mary Poppinses land on stage to fight and defeat the nightmares which were haunting children's dreams. The sequence is called "Second to the right and straight on till morning."
Read more about this topic: Mary Poppins (character)