Although I too doubt the rumours, may work Ok with D sticker passengers, good opportunity for "try before you buy", just taking a short/cheap domestic sector, and put a DJ code onto it. I imagine in the morning there also might be good interlining opportunites to to ferry pax down to MEL from other airlines, but the evening departure in the other direction wouldn't work so well for this.
Given the arrival/departure times, PER might just work (now wouldn't that be interesting with nice J and Y+ products across the contintent) .... LAX/SYD arr 7:10 SYD/PER 8:30/11:30 PER/SYD 12:30/18:40 SYD/LAX dep 20:00 ....hmm probably a litte tight. Maybe CNS would work though???