Announced in their public Facebook group, JustSim have confirmed their next airport is Rhodes International Airport "Diagoras"! Located on the Greek island of Rhodes, the airport has a single runway, and can accommodate aircraft as large as a 747.
The previews shown are for the Prepar3D flight simulator, and the airport is available for purchase. However, the X-Plane edition should be available several days later.
In total, forty preview screenshots were shared over at their Facebook group. Be sure to follow JustSim on their Facebook page if you haven't already done so!