The Nikon DL cameras were delayed because of the Kumamoto earthquakes and serious issues with the integrated circuit for image processing - this is according to Nikon tech support's answer to reader:
Thank you for contacting Nikon regarding the premium compact cameras, Nikon DL18-50 f/1.8-2.8, DL24-85 f/1.8-2.8, and DL24-500 f/2.8-5.6. As indicated in our press release on April 20, the DL series will be delayed due to the effects of the 2016 Kumamoto earthquakes and serious issues with the integrated circuit for image processing built into the three new premium compact cameras. These cameras were originally scheduled for a June 2016 release.
The new release date has yet to be determined and we will announce the information as soon as it is decided.