They should have scratched Creed 2, and instead had Go4It playing Rocky's younger brother sailing in from Sicily.
I'm actually in the movie Rocky Balboa. I was an extra, I was in the crowd during the fight scenes, there were about 500 extras there, it was filmed at the Mandalay Bay Arena, unforgettable experience, not to mention super inspirational. Stallone was an absolute beast, his work ethic is unreal, filming was 2 days, both days about 10 hours, Stallone got his ass kicked, the fight wasn't choreographed at all, dude was taking punches left and right, falling to the canvas, jumping in and out of the ring to watch the playback on the monitors (because he is also the director), pumping up in between scenes, jumping rope, punching with weights. No breaks, never got tired, I saw him only consume 2 protein shakes both days. Also met Burt Young (Paulie) he's cool as fuck, Mike Tyson was there as well for a quick cameo.