There is a lot of stuff on here which seems unlikely as has already been pointed out. There are however some things which seem pretty factual.
The captain was local with 7000 hours (sounds ok but probably a newish captain). The first officer was a Qantas guy on loan with again lots of hours, one year at Emirates (so in reality not too much 777 time).
The weather was 49c with windshear and low QNH all affecting performance. The position of the gear, communication etc. indicate a go-around was being attempted. Everyone got off alive, which shows how solid Boeing build them and what a great job the cabin crew did given the pictorial evidence.
Go-arounds are one of the worst flown manoeuvers in airline flying. Autothrottle logic as a contributing factor has caught people out on several occasions, for example Turkish in Amsterdam and Asiana in SFO. There does seem to be a possible scenario developing.