As soon as Anderson Silva returned to the UFC to fight Nick Diaz , everyone began to wonder, could Silva’s return lure Georges St-Pierre back to the Octagon. Despite many misguided reports that had targeted 2015 for the former UFC welterweight champion to get back in the cage, it now seems less likely than ever that there is anything compelling enough to draw St-Pierre back. St-Pierre has long said that the problem of rampant performance-enhancing drug use in mixed martial arts is a large part of why he stepped away when he did.
See the article here:
Georges St-Pierre Hopes for More Stringent Drug Testing; Shoots Down Return Rumors – MMA Weekly