If QF does go for the 777, it will be the 767/743/744 fleets that will reduce, a 777-300ER is longer than a 744, carries about 30 seats less for 40% less cost.
Dont think the 330 will go anywhere, espically with a rumoured embargo by the manufacturer of having pilots flying the 380 without airbus experience. Wonder how that will go down with capts at the top of the list on the 744 being bypassed for the higher paid 380 slots as they have no airbus experience.