737’s are history at Qantas, expect to see the 738’s replaced by 321NEO, similar burn but a lot more bums on seats. Fleet commonality within the group and the ability to transfer aircraft when needed between groups. Think containerized cargo, less ramp staff, pilot controlled loading. The group has a huge order for these things, and it has never been stated that they are all for Jetstar.
787 will stay at Jetstar for at least the medium term.