Well, it is in development, and only about 5% of films that enter the “in development” phase make it to the big screen, but then that is a better chance than 0%. I checked with Iain’s agent and she confirmed that it is definitely on the cards.

Dominic Murphy at F&ME is working on it.

See: http://www.hollywoodreporter.com/hr/content_display/world/news/e3ied2621cfc5e7c4cc39caf91ba8e8ecfa