, Marinos said he remained optimistic that the four-nation event will be staged in 2020.
He said the likely destination would be New Zealand and Australia.
"We remain very positive about that," Marinos said. "Obviously the biggest elephant, or anomaly, in the room is what sort of restrictions that could come in. So we always have to be guarded by governments and health authorities around that.
"But we are certainly very positive as a group to deliver a Rugby Championship this year in whichever market we can, where we can get all the teams in and get the competition underway."
Marinos added that they were looking to start the tournament towards the end of October, with a conclusion at the beginning of December.
"We need eight weeks in order for us to deliver a Rugby Championship," he added.
The Springboks won the 2019 edition of the Rugby Championship.
An October-December Rugby Championship would however scupper South Africa's planned end of year tour to Europe where the Springboks where due to play Italy, Ireland, France and Wales between 7-28 November.
READ | Springboks: Rugby Championship defence looking doubtful