depending on the terms and conditions of the domestic new employer i dont think that in the longer term that transfers would be impossible.
one would have to think that in the short to medium term it would be unlikely as it would defeat the purpose of setting up the biscuit chucker qccb in the first place...
but i certaininly think that there would be more flexibility than SH crew have because of cost.
i expect that the MAM crew will be offered A380 next if they wish to be recruited into that division of QCCA some time next year when recruuitment starts up again and more aircraft arrive