Don’t think it will be what the pax want, it will be what they get!! Airlines will be looking to save every penny they can when business resumes.
The idea appears to be very plausible particularly given Darwin’s close proximity to Asia and beyond in comparison to the eastern and southern states. They certainly have plenty of room to expand the aerodrome infrastructure and I think the current NTG would jump on board with this.
The Darwin economy certainly needs another long term investment project to kick start the local economy since the LNG construction wound down a few years ago, then add the current crisis.