I think the 60s-90s would be great. I tend to favor Heavyweights but you had some really good fighters in the smaller weight classes in the 80s and 90s. You have Ali coming onto his own in the 60s and the 70s was the golden age for Heavyweights with Ali, Foreman, Frazier, Spinks, and Norton with Larry Holmes emerging toward the end of the 70s. The 80s had Suger Ray Leonard and Duran among others with Larry Holmes being the top guy in the Heavyweights until Tyson and Michael Spinks. The 90s was also a great decade for Heavyweights with Tyson, Lennox Lewis and Evander Holyfield in addition to the successful come back of George Foreman. We even had Butterbean, the king of 3 round matches. You can’t forget Chavez either in the lower weights. After 2000, the heavyweight division was pretty bad except for the Klitscko brothers but we are seeing a resurgence the past 4 or 5 years with the likes of Tyaon Fury. Bottom line, having real boxers to simulate would be a wonderful addition. I think the biggest challenge will be making everybody happy because everybody has their favorites. It will be similar to Madden American football where some people will complain about the ratings and think they should be higher than they are. Besides that, I think it would really add to the game and would be a helluva marketing item to get many more people buying.