Supercars has confirmed a drastic calendar change, which would result in the current season finishing under lights in Sydney, is being discussed.
The Aussie series has been in a coronavirus-induced hiatus since March, its season brought to a halt after a single completed championship round.
It's since unveiled a revised 2020 schedule featuring 12 rounds in total - two less than originally planned - with the season bleeding into 2021 with a January trip to New Zealand and a finale at Mount Panorama on the Bathurst 12 Hour weekend in February.
That, however, is set to change as part of a significant shake-up to the revised calendar.
Autosport understands neither of the 2021 rounds will go ahead.
The trip to New Zealand is likely to be called off altogether, while the Bathurst plan is expected to morph into an alternative that will still satisfy the category's agreement with the New South Wales state government to host a marquee season finale.
The centrepiece of the second version of the revised calendar is likely to be a night race at Sydney Motorsport Park, utilising the new $16 million permanent lighting system for the first time.
While exact details are yet to be finalised, Supercars has since confirmed that the calendar "remains subject to change".
The only race locked in to its current date is the Bathurst 1000 on 11 October.
"Supercars can confirm that since the release of the draft revised calendar in May, talks have been held with teams, state government authorities and broadcast partners about further alterations to the 2020 Virgin Australia Supercars Championship calendar," a Supercars spokesperson told the official series website.
"These talks are ongoing and the calendar remains subject to change
"All options are being discussed including a series finale under lights at Sydney Motorsport Park in December.
"The Supercheap Auto Bathurst 1000 will not shift from its confirmed date of 8-11 October at Mount Panorama.
"These times are unprecedented for our sport, which is why we have to remain flexible with our calendar arrangements and if required, we will make significant changes."
The rumoured date for a potential Sydney finale is 12-13 December, the same weekend currently earmarked for the Sandown round.