July 2018 will see the release of Catan: Der Aufstieg der Inka (The Rise of the Inca), a new standalone game from Klaus Teuber and his son (and increasingly frequent design partner) Benjamin Teuber that is for 3-4 players with a playing time of 90 minutes.
This initial description from KOSMOS doesn't give much to go on, but BGG will be at the Spielwarenmesse trade fair in February 2018, and we'll record a more detailed overview of the game then. For now, we offer this summary:
Detailed figures and colorful illustrations are used in the game to spread the atmosphere of South American culture as you relive the rise and fall of one of the continent's most impressive cultures.