I just booked MEL-BKK flying out on Sunday night, back the following Saturday midnight.
The Sunday night flight shows as 777-300.. but the 29/OCT flight is showing as A350-900!?
Maybe they're going to run some test flights?
I have a free upgrade available with my gold membership. Not sure if I should use it for this round trip, or wait until there's more certainty. I think my upgrade expires in March 2017. My birthday is December, so I think I can use another upgrade then too.