The only aircraft with a hope of doing it is the A350-1000
Is that a problem though? It’d just mean no 777s for Qf (again, and this time, ever), but the A350 seems to have proven itself pretty capable so far, as well as popular with pax. It also might solve their issue of a negotiated settlement to the 8 remaining and infilled A380 orders that Airbus reportedly won’t let go of.
As as for the two A380s out, well there’s a problem. If only QF had a 4 engined jet that could cover for it for a little while...