keg,
One imagines that given the size of the order, there will be plenty of opportunities for current QF drivers, if they are suitably qualified and experienced, to fly the 787, whatever form of rodent or logo adorns the tail. And their terms and conditions would no doubt be appropriate to the "market forces" prevailing at the time they made their individual or collective choices regarding their chosen fleet.
As its stands though, asking the Jetstar pilots to ensure and boilerplate the process of getting mainline drivers seamlessly and happily onto the 787 at current Qantas pay rates is a bit steep. There's some heavy lifting to do if you think this could or should be done and I'd be guessing not a few people reckon AIPA should step up to the plate themselves.