Jetstar 787s? Perhaps this...
Mainline 747 gone. Mainline A380s will never come back. QF will RIN those two fleets, and look to get rid of as many senior long haul drivers as possible. A real clean out.
Once that’s done, JQ 787s to mainline to bolster their international fleet, plus an eventual A350 order at dirt cheap post COVID prices to replace the A330.
JQ to go back to exclusively A320/321 fleet to compete with Rex and protect LCC market share.
That’s my guess, but who knows!