You are not blind, updates are not announced with dates far in advance.
It is usually informed within the same week or some days.
But generally speaking the larger updates are in 4 to 5 week intervals.
Christmas and New Year coming up, so I'd guess that we'd either see a content drop just before christmas (3 to 4 weeks since last) or a larger one some time after new year (6+ weeks, but it is holiday season after all).
Guessing mind you. So all I can say with any reasonable certainty is that it will be worth the wait, as that has been the case so far without fail for more than a year