The next update is basically finished aside from one small bug that may not even be a real bug (it involves granting achievements, so not that big of a deal).
As for a release date, I am probably not going to be able to release the next update until September 19th. Like an idiot, I ran a random discount starting in early August, so I have to wait 30 days until I can create another discount.
Since I plan to leverage my "round of visibility" (a Steam tool for marketing) with the next content patch, I want to run a sale at the same time to give the next update release the best chance for success.