In airports selection menu there are 4 airports to come in the future that are already decided.
It will for sure take some time, but at some point, New Orleans, Nagoya, Muscat and futuristic Prague (based on real plans) will come. Of course, that will come with real connections and liveries for a specific region. Stay tuned for that.
First airport preliminarily is planned for end of November - its not yet decided which one that will be, New Orleans may be a bit problematic because there still is not good coverage on online maps for new terminal as it is currently still under construction