I think it has approximately the same production time as Movie 14. The very first thing related to that movie started in 2011, with Toei approaching Toriyama to do a movie, as for this Movie 1, the very first thing related that we know of was a storyboard around September 2017 seen in one of the animator's account Twitter. In other words, about two years of production time for both films, and it was probably the same for Movie 15 as well.Super Saiyan Swagger wrote:Or, because of the longer production time this film is getting compared to the last two, we'll we see something sooner?
I figure they release information and merchandising stuff whenever they feel like it regardless of how the production is going.