Thanks to the Xenonion, it's become a running gag that
Universe Universalis is a popular grand-strategy game within the Stellaris universe. It's an affectionate parody of Crusader Kings, EU, and Stellaris (natch). This latest "ad" is a playful dig at the recent announcement for Stellaris' Overlord DLC.
What is that on the cover? An Orc?
Not an Orc. A Necroid, I think?