Mirrorrorrim
Hero
If UA 9 succeeds in fixing the Monk and Druid, most PH playtesting will be done by the end of the year. They will be well on their way to being ready for printing. I agree that they'll want the release to coincide with a Summer convention if possible.My own personal guess is they will debut the PHB at GenCon '24 in August, then the MM and DMG probably in September for one and October for the other.
I think the MM and DMG are already being written, and the playtest options for them are really only going to lead to editing some systems, rather than overhauls, so I don't think we'll see any serious delays (unless the world causes a delay).