Spa-Francorchamps, Monza, Hanoi, Baku and other Formula 1 host venues have now emerged on a draft 19-race 2020 calendar set to begin in July.
According to sources, the calendar was sent to certain members of the media by an unnamed F1 team.
It follows earlier news that Spa and Monza may, in fact, be excluded from the racing if it gets underway this year amid the coronavirus pandemic.
"Yes, it is still quite possible to have a Belgian GP," race promoter Spa Grand Prix president Melchior Wathelet confirmed to RTBF.
"The date is still free, and Belgium is a candidate for the organisation of its event."
As well as 'double races' in Austria, Britain and even Bahrain later in the year, the calendar includes Barcelona, China and Hanoi - but not Zandvoort or Singapore.
Italian automobile club president Angelo Sticchi Damiani told Formula Passion that Italy might also host a second race in addition to Monza.
"Personally I would be pleased if we could consider the Imola and Mugello circuits for a possible second Formula 1 race," he said.
Officials in Azerbaijan, meanwhile, hit back at earlier claims that the Baku street race will definitely not go ahead.
"The information put out by media outlets on this issue is not true, as Formula 1 has not yet announced a new race calendar," a spokesman told Trend news agency.
A race in Hungary may be able to dodge the country's new events ban until mid-August by hosting its round later in that month. The new provisional calendar pencils in an August 23 race date for Budapest.
Still, some are opposed to F1's push to get back up and racing.
"It seems absolutely incredible to me that in the current situation, with the pandemic still raging, one series can be so optimistic by saying that the season can start in July," Finnish broadcaster Niki Juusela told C More.
"It feels as though there is now pressure to make some kind of plan, and that the importance of this is greater than realism itself."