The Knights of Lilies and War
More information in the link. In reddit, some theorize, because the heraldic, that they gonna add Brittain and another French variant, but is not clear if gonna be French Sicily, Burgundy, or a another hero civ, with Philip II for example.
https://www.ageofempires.com/news/age-of-empires-iv-knights-of-lilies-and-war-announcement/
https://www.reddit.com/r/aoe4/comments/1jp2b4f/youve_got_to_be_kidding_me_4_new_french_variant/