The highly-rated winger was targeted by Fulham and Nottingham Forest last summer, with a step back up the ladder following relegation into League One considered to be merely a matter of time.
Interest was, however, fended off and Sako remains on the books in the Midlands - where he has helped to mount a third tier promotion bid.
Jackett is aware that speculation will likely build again in the summer, regardless of what division Wolves find themselves in, but he is hoping that the 25-year-old Mali international can be retained.
He said in the Birmingham Mail: "The future for me is Peterborough and hopefully he plays a very good part.
"Going beyond that, and right now I am not going too far beyond that myself, he has a year left on his contract, he is happy at the club.
"I'm sure there will be some discussions with the powers-that-be in the summer as to what his future holds and what he wants to do.
"But I do see somebody that is settled and happy at the club."
Jackett added: "If there was a possible potential scenario that he could stay here, I'd be very positive to it.
"He is a player I have got along with, I think he is a good player and I have a lot of respect for him as a professional. I think it is one of those things that you will see in the summer what happens.
"Ultimately it will end up with who comes in for him. If a Premier League club come calling then that's really the bottom line. Then (it depends) on which division we are in.
"That's the thing, but for any player like that if somebody further up the ladder comes in with enough money... then it is all over really.
"Similarly, if nothing happens and there is no deal or whatever and he is here, I'd be very happy if he is here, very pleased. I'd continue to work with him and to pick him, as I have this year."