On Tuesday 8 September, QF7,, the 1200 'high noon' SYD-DFW is not expected to depart until 1710 hours in the late afternoon. This seems optimistic.
Aircraft is supposedly A388 VH-OQD that's arriving in SYD at 1514 mid afternoon as QF64 from JNB. This suggests another A380 has failed, as it's not normal for a 1455 hours scheduled arrival to form a 1200 timetabled departure.
Monday 7's 1750 hours SYD-LAX QF11 (VH-OQG) took off at 2014 with same day arrival at 1638 hours, 128 minutes late.
On Tuesday 8, QF185 from BNE down to ZQN (the 1005 hours with B738 VH-VZH) was in the sky at 1049, so gate arrival becomes a likely 1617 hours, 42 minutes late.
A333 VH-QPC is on 'the 23', the 0950 hours longstanding SYD up to BKK. It took off at 1031 so gate arrival looks like 31 late at 1711 hours.
VH-XZB, a sister plane, is operating QF183 from BNE to NLK, the 1135 hours in the sky at 1216 for forecast arrival at about 1510, half an hour behind the timetable.