Why? Who's trying to buy a team and move them to Winnipeg?
Balsillie is the only person with any money who wants to relocate an NHL team, and he has his eye fixed firmly on Hamilton. Either the Coyotes will move to Hamilton, or they will die in the desert.
As far as a "new" team -- that is, an expansion team -- that's not going to happen for a long, long time. And Winnipeg would be lower on the NHL's list of potential sites than Hamilton is.