The Sweden striker appeared to commit his immediate future to the club in the wake of the team's title triumph, which was sealed with victory away to Lyon before last week's party in Paris.
But with Ancelotti having asked to leave amid strong speculation linking him to Real Madrid, things appear much less certain at the Parc des Princes and Ibrahimovic has now said he does not know what might come next.
"We'll see, there is a lot going on," he told Swedish broadcaster TV4. "At other times when I have said I should stay, I changed clubs, so I dare not say anything.
"I have two years left and anything can happen. I have learned this in football."
Asked about Ancelotti, he said: "I have a great relationship with him and I do not want him to leave. For me he is the right man for this project and he has done fantastically well considering how difficult it was.
"He has not said much to us, it's private and between him and the club."
However, Ibrahimovic said he did not believe many coaches would be capable of handling PSG as well as Ancelotti.
"The team is now well regarded internationally and has many great personalities on the team," he said. "You have to bring in someone who can handle it. I do not think many can do it."