The 33-year-old has had an excellent campaign since joining Rangers from Inter Milan last summer.
He has already been linked with a move back to Italy, as well as with Arsenal.
Now with QPR's relegation confirmed, his future appears far from clear - but his agent Josias Cardoso insists that the club will decide.
"Everything said on the player's future is absolutely premature, there is still nothing concrete," Cardoso told Calciomercato.
"Julio wants a team that proves it has a focus on him, but anyone interested in him will have to talk first with QPR, because the contract with the London club expires in 2016.
"In two weeks I should come to Europe to talk with Julio - but back to Brazil? I don't think so. If QPR were to decide to sell Julio Cesar, I still see a European future for him."