I've actually seen the full interview from which that info was taken, and it's interesting to say the least. Gives insight into the movie's creation, and how they were able to include elements that just wouldn't fit into the game within the planned time. EDIT: Hold on, a source from the Uncovered event says it began in 2013. I'd be extremely surprised if they could turn out something like that in just one year. Extra-EDIT: Here's the source.