VX may not be able to command the necessary yields, and also wouldn't want the orphan fleet.
VA is in financial dire straights at the moment, probably cannot command the necessary yields, and also wouldn't want an orphan fleet (not to mention that an A350-1000 is too big for them).
You mean VS, not VX which is now defunct.
Given both BS and BA have the A35K, a fleet of A35KULH wouldn't be that much of an orphan.
VA would not be interested in such a long distance flight and has no slots at LHR anyway.
BA are in the same alliance as QF, and could just codeshare/put their customers on Qantas metal
In theory yes, but without JSA immunity, which would be unlikely as long as QF also has its JSA with EK, this is unlikely.
QF clearly want to do the Sunrise flights ASAP, and I'm not doubting that whatsoever. But Qantas makes their biggest profits in the Australian domestic market, and could also use the 797 on several short/medium-haul international routes. If the 797 can further increase their domestic/short-haul-international profitability then that could be a huge boon for Qantas, enough to make QF willing to wait on Sunrise.
AJ has made a lot of noise about Sunrise and wants it to happen before he finishes up as QF CEO; I don't think he could tolerate a delay of 2 or 3 years. He has already been CEO for 11 years. Seeing him remain the role beyond 15 years is unlikely.
The 797 is attractive to QF but realistically it is unlikely to arrive before 2027. QF will need to replace most of its 738 fleet before then and that is probably more important right now and Boeing would be better advised to concentrate on that competition particularly as the QF Group is already investing in the 321Neo and the MAX issues may be pushing them further that way.
Wouldn't SYD-PER-LHR or BNE-PER-LHR be a higher priority?
QF already offer one-stop service to LHR from BNE and SYD via SIN. It is hard to see what re-routing these services through PER instead would gain. Pax can already join QF9 in PER if they desire but it isn't any quicker than the SIN option. If anything, a successful launch of non-stop services to LHR from MEL and SYD may see the PER-LHR service canned.
717, 721/2, 732/3/4/5/7/8/9, 742/3/4, 752/3, 762/3, 772/E/W, 788/9, 300,310, 319,320/1, 332/3, 359, 388, DC9, DC10, F28, F100, 142,143, E75/90, CR2, D82/3/4, SF3, ATR