It looks like Colin Firth’s new character, as well as the film’s setting, truly helped to ground Mary Poppins Returns. Because although there will be plenty of flying, magical bubbles baths, and musical numbers, the story also had to be grounded in the Banks family’s reality.
Article source: https://www.cinemablend.com/news/2463838/why-mary-poppins-returns-added-colin-firth-as-a-villain