It looks like the release of Armored Core 6 is just a few months away. The game has already received a rating in Korea and it signals that the release date announcement is imminent.
As reported by Gematsu, the highly anticipated Armored Core VI: Fires of Rubicon received a 12+ rating in South Korea. It reveals that the game contains violence which is expected of the title.
The rating is a sign that FromSoftware is primed to announce the release date of the game and it confirms that the game is already in a complete state and will be ready within the year.
There have been a number of upcoming titles that have recently received ratings in Korea. Street Fighter 6, New Tales From the Borderlands, and Ghostwire: Tokyo received ratings in the country and announced their respective release dates around a month later. However, receiving ratings does not guarantee that FromSoftware will announce anything soon, so take this information with a grain of salt.