Wherever Qantas or any other International Airline decides to focus on as a port of entry into Australia will most likely depend on which state government stumps up the most cash in a post COVID world. Which state government will subside the most testing, quarantining etc.
Forget about $200mil odd to get Virgin to relocate to whatever state, the real money will be in which state puts up the most cash to deal with all the COVID restrictions on eventual inbound foreign traffic.