The long-term future of the Brazilian Grand Prix is up in the air.
The Interlagos track, which hosted its first Formula One race in 1972, is due to be sold early next year. Although F1 has a contract through 2020, no one seems to know what will happen after that.
"The contract will be respected because it is an obligation of whoever buys the track," said Sao Paulo Mayor Joao Doria, refusing to divulge who the buyers are. "We hope that afterwards we are able to extend for another 10 years."
Doria said the sale of Interlagos, which sits on an area of almost 1 million square meters, is "irreversible" and should happen in early 2018. The track is expected to be preserved after the sale, while apartment buildings will be added to the complex.
Sao Paulo city councillors, however, have argued that the real estate could be more profitable after privatization, and that could mean the end for a track that was inaugurated in 1940.
It is also unknown who the potential new owners are and what they think about the mayor's project for post-privatization.
Some estimate the sale of the Interlagos track, which many consider a burden to taxpayers because it hasn't been profitable in years, could raise up to $600 million.
Brazilian GP organizer Tamas Rohonyi said other venues could replace Interlagos in case the new owners fail to extend the contract with F1, but he did not provide details.
"What I am sure of is that without F1, Interlagos would be dead," Rohonyi said. "And we just don't know who will be at the table to discuss that."
Rohonyi said he thinks the unknown new owners will want to keep F1 at Interlagos, while Formula One boss Chase Carey said "there is a great future for Brazil in F1."
The Brazilian GP has struggled with low ratings at home and less money from sponsors in recent years. Next season, there will be no local driver in the grid for the first time since 1969, which could make Brazilians even less interested.
But tickets sales were brisk once again this year, despite little being at stake since Mercedes driver Lewis Hamilton had already won the title.
Another issue at Interlagos is security, something that made headlines this year after members of the Mercedes team said they were mugged at gunpoint as they left the track.
Doria said privatization will make the track safer and organizers more accountable.