Without a date being posted on the product page, PM doesn't likely know the date...just yet.
Upon receiving a date, they'll post, but take this date with a 'grain of salt'. Based on recent history, missing the date is much more likely than meeting projections.
Most tricks that are 'pre-released' rarely make their initial projection date...yes, slippage occurs.
Recent history affirms this.
As for me, I simply do not order a pre release and, candidly, I've not missed anything very good ;-)
Best wishes...