Board Thread:General Discussion/@comment-25896389-20160402095124/@comment-1916997-20160517051147

Hmcooper4 wrote: while there are some that would like to see Mary Poppins as either a villain or a hero, neither will happen. Disney does not, to my knowledge own the rights to P.L.Travers works, and She explicitly forbid Disney from making further adaptations of the Mary Poppins stories after her experience with the first film.

So the chances of Once getting the rights to Mary Poppins are None and None. Well Ms. Travers estate does not exactly share her settaments on that, as Disney has done a stage musical and the film about making the movie (Saving Mr. Banks). I'm sure if Disney was to come around with a big enough paycheck to get Mary Poppins on Once, the Travers estate would take it.