https://www.altchar.com/game-news/age-of-empires-iv-is-currently-aiming-to-release-in-2021-apEJH9V4ePwp
*SNIP*
In the post, FairlyEmpire revealed a couple of bits of info, which the devs revealed at XO19 event in London and the release window is one of the information that they've mentioned. "Age Of Empires IV is currently aiming a 2021 release. It's been in active development for about 3 years," ResetEra user wrote in the post
https://www.resetera.com/threads/xbox-game-studios-ot6-im-back-to-rise.132019/page-380#post-26570324
FairyEmpire said:
Couple fun bits of info I gathered by talking to devs and such at X019. Some of this is probably known but here you go:
Age Of Empires IV is currently aiming a 2021 release. It's been in active development for about 3 years. The Age Of Empires 3 remake is currently planned for mid-2020.
Reddit:
https://www.reddit.com/r/pcgaming/comments/dy20bl/age_of_empires_iv_is_currently_aiming_to_release/