I think there is a extremly strong change we see stage 3 arrive in the game on either the 23, 26 or the 29.
Things that point to this
Summer starts June 20 so this is the easiest one
The change to stage 1 showdowns. This will make it easier for people to clean up stage 1 so they do not fall to far behind.
POTM mid month release, this is being released earlier then the other 2 which means there has to be more content towards they end of the month along with the 5th inning that it would have been to much
This might be reading into to much but points 2 and 3 are just to coincidental