Koei Tecmo and Omega Force published a FAQ page on the Japanese Dynasty Warriors 9: Empires official website.
Dynasty Warriors 9: Empires will be available in Japan and Asia on December 23, 2021, and North America and Europe on February 15, 2021.
It also confirmed that Dynasty Warriors 9: Empires will have special stages based on historical battles, such as the Yellow Turban Rebellion and the Battle of Guandu.
When a character joins a faction in the Empires games, they will generally start as a regular officer.