The A380 would lend itself to a 2 airline operation.
Qantas can sell the lower deck with First, Business & Premium Economy with the usual QF sevice model.
Jetstar can sell the upper deck with JQ Economy staffed by JQ flight attendants with the JQ service model.
........and the bit at the front where the pilots sit, contract that out to V Australia.
Everyone wins.
7378FE