TORONTO, ON - SEPTEMBER 27: NHL Commissioner Gary Bettman and hockey icon Wayne Gretzky unveil the League's Centennial celebration plans for 2017 during a press conference at the World Cup of Hockey 2016 at Air Canada Centre on September 27, 2016 in Toronto, Ontario, Canada. (Photo by Minas Panagiotakis/Getty Images)

TORONTO, ON - SEPTEMBER 27:  NHL Commissioner Gary Bettman and hockey icon Wayne Gretzky unveil the League's Centennial celebration plans for 2017 during a press conference at the World Cup of Hockey 2016 at Air Canada Centre on September 27, 2016 in Toronto, Ontario, Canada.  (Photo by Minas Panagiotakis/Getty Images)