Surprised this article (unless I missed it) hasn't been referenced :
Virgin Australia has emerged a much stronger airline from the Covid-19 pandemic than it was at the outset of the crisis. A court-led restructuring of
airlineweekly.com
Why then fly a 737 to Tokyo?
It’s the slots, silly. Virgin Australia has one highly sought-after slot pair at Haneda airport. Rules governing the use of those slots — typically an airline
must use a slot every 90 days or lose it — have been waived during the pandemic, but those waivers are scheduled to sunset at the end of March.
June 28 happens to be right about 90 days later. Reacquiring a lost slot pair at Haneda, which Qantas would certainly jump for, could take years if it happened at all.