From the GCmapper courses neither route appares to infringe the "below 60 degrees South" rule. I have been told that some QF flights to SCL have got down to around 70 South, due to winds. If that is so I assume QF have concessions to do so. If CASA would approve such concessions for a twin I have grave doubts.
It's my understanding, and I may be wrong, that the restrictions on polar/below-60-south operations were relaxed at the same time CASA amended the rules to allow extended EDTO for twins - I had the impression those changes (in 2015) would've permitted the former VA services to JNB to operate on the optimum route rather than north of it. I certainly don't see any impediment to QF being granted the EDTO approval necessary to operate either of JNB or SCL with the 787s, assuming CASA has the willingness to follow through on its own rules - that remains to be seen, and I guess is my own version of Gemuser's grave doubts.
Please atleast re read my post on why I think HND will get it, no body has proved weather HND can not can’t take the A380.
This isn't the first time HND has been discussed in the context of what QF might do with A380s in the future, indeed the conversation was had in the March edition of this thread when someone raised the question with regard to the 747 retirement.
There are multiple restrictions on A380 operations at HND, as Fuling already pointed out, and currently zero scheduled A380 operations - now, how likely is it that one of the many A380-operating airlines (like BA, QR, EK, SQ, and so on) which fly to HND wouldn't have already put an A380 on that route, at least seasonally, if the restrictions were at least vaguely workable, considering: the level of demand from passengers and airlines alike (and the squabbling that goes on over access); and HND is arguably very high yielding (and must surely be so for QF given they leave an aircraft there for around 16 hours every day).
It's also worth pointing out that A380s would have to operate in accordance with all the restrictions on their movements at night when the airport is in one of its busiest periods. I would also add that HND hasn't tended to see much of the F-equipped B744s - they do go there, but not as much as the non-F - and with OEB leaving next week I believe that will obviously be the end of F to HND... so is QF really going to put F into HND on a regular basis, when they've not in the past? (This is one of several reasons I also can't see JNB with the A380)
On balance, I really don't think QF is going to be the first to take the A380 to HND, and I personally don't see them ever doing so.