Utilising QF B744 crew on the current QF long-haul EBA conditions;
No.
Utilising QF B744 crew on LWOP from QF on the current EFA EBA conditions;
Unlikely...but a slight possibility in order to alleviate excess crew resources on the 744.
Hiring new B744 experienced crew;
Almost certainly, with positions being advertised externally and current Qantas crew required to resign from their current position to take up an EFA position.