The final warm-up game before the competitive action starts next Monday at Everton will feature a mix of first-teamers, youngsters and stars from the past.
Although the exact make-up of the squad has still to be confirmed, the boss told MUTV recently: "We've got the internationals on but we've got Nemanja Vidic, Rio Ferdinand, Paul Scholes and Ryan Giggs and I'm bringing back some of the old players like Dwight Yorke, Andy Cole, Quinton Fortune and Clayton Blackmore. Then it's all the young players.
"Yorkie refused to go unless he was captain and takes all the penalties and corner kicks! We'll go up there with people expecting to see Manchester United at our best and we have a lot of supporters from Aberdeen. They travel down on a flight for every home match, I think 120 come down, so we've got fans up there and we want to do well in every game. It'll be nice to do it coming up against my old team."
Sir Alex also paid tribute to Simpson, who played under him during his successful tenure as Dons manager prior to his switch to Manchester back in 1986.
"He was one of my first signings at Aberdeen," the boss recalled. "I think he was the first signing as he was training with them at the time and was only 15 or 16.
"He developed very well and was totally committed. He was a serious competitor with a tremendous engine, going up and down all the time, and was an integral part of the Aberdeen in the great success they had and played in all the big games.