At least Qantas is only paying for 1/3 as these are JHK aircraft.
Given all the recent gnashing of teeth about the 65% line in the sand I don't think Aus domestic needs any more capacity.
Jetstar Asia doesn't need anymore as it has stopped expanding thanks to fare war.
Jetstar Japan is also awaiting approval of a second base to let it expand.
So no easy slots to put these aircraft to use.