Microsoft announced a new game in the series, Zoo Tycoon: Ultimate Animal Collection, for Windows 10 and the Xbox One on August 20, 2017. It is an enhanced version of the previous game in the series, featuring 4K resolution, HDR and 60 FPS support on Xbox One X. In addition to improved graphics and gameplay, new animals such as kangaroos, koalas, and cougars were included. It released on October 31, 2017.
Source: Wikipedia, "[en.wikipedia.org/wiki/Zoo_Tycoon%23Zoo_Tycoon%3A_Ultimate_Animal_Collection_%282017%29 Zoo Tycoon]", available under the CC-BY-SA License.