The massive-scale space RTS AI War 2 has a new expansion out with AI War 2: The Neinzul Abyss, and it seems Arcen are now finished with the game and moving onto their next project.
Read the full article here: https://www.gamingonlinux.com/2022/04/ai-war-2-the-neinzul-abyss-dlc-out-arcen-finished-with-it