Let the games begin! Lineal Middleweight World Champion Canelo Alvarez and WBC/WBA/IBO Middleweight World Champion Gennady “GGG” Golovkin will be featured in an 8-bit boxing game which will launch on Tuesday, Sept. 4 — 11 days before their eagerly-awaited world championship rematch.    Golden Boy Promotions and GGG Promotions have partnered with GameCommerce, a global leader in Brand Playables, to design and