Qantas will get some 747-800s with special tanks fitted in the forward hold as Boeing are pretty desperate to sell them. They'll be able to get them for less than the 787 rate and someone will get a bonus for such ground breaking thinking.
After all, the 787 and the 777 are not the right aircraft for qantas.
Meanwhile Jetstar will get the 787/777 NG and fly the pacific.
4 engines for premium passengers and longhaul. Twins for leisure passngers.