I reckon Qantas want the A380s back. The longer this goes on the less likely that is though. I suspect Qantas will invest in them for the next couple of years in the hope they’ll be needed and kick the can on making a final decision down the road for a while.
There are about 50 A380 Captains over 60. Half the number of A380 Captains so about 6 aeroplanes worth. They could bring back 6 A380s and still not need additional crew. Probably enough notice to train up other crew if they intend on bringing additional A380s back.
There are 44 A330 Captains over 60. About 18% of the total A330 Captains. Similarly I reckon the ramp up would be slow enough that we’d be able to cover for the additional crew if eventually all the A330s are required.