The other thing worth mentioning is that QF Flight Ops ability to keep a secret has improved dramatically. The PER base landed upon a completely unsuspecting pilot group. No pilot I'd spoken to in the lead up to the training slots being released had mentioned it even as a possibility.
Therefore, whilst I'm more likely to think that IF (and it's still a massive IF) QF change their minds about the 787, then no one will know about it until AJ announces it.
Coincidentally, he has a press conference scheduled for 10am Monday morning.