for what its worth QF has done back to back sales recently to every destination in a staggered arrangement. with latest email today saying Pacific/NZ on sale.
in lead up to prior DSC we have seen similar skirmishes of back to back sales of some sort... so i suspect the new DSC comes once this sale is over towards latter part of Aug, which is consistent with timing if last year. i am adament that qF marketing is "lets try to sell as much via Sales, and when all that fails launch DSC"
strategy is book a refundable J for now and see how it pans out next 2wks. at least you have seat secured if travel is a must, but refund it and buy new one after DSC. also avoid booking on first day of DSC-the travels.booked on first day before UK clock changed never posted and.had to chase QF down for it with many emails.