GayaSimulations, a developer who stays behind sceneries to both X-Plane 11 and Prepar3D like their East Midlands, Edinburgh or recently released Kos, is now continuing on their Vienna Scenery.
These previews were shared via GayaSimulations Facebook page, these previews are from the X-Plane 11 simulator and contain screenshots of the terminal building, tower and the taxiways. The developer stated that the scenery should be released very soon. The scenery will include SAM/SODE with VDGS compatibility, and the new parking will be available there as well, Prepar3D previews of the scenery should come later.
You can find more information on GayaSImulations Facebook page.