How Gi-hun’s fate was foreshadowed
We all know that Gi-hun won the disturbing tournament, but what price did he pay for it? His most powerful motives for participating/rejoining the games were to keep his daughter in Korea and assist his ailing mother, yet both proved unsuccessful.
Although this isn’t a case of the series predicting his triumph, it reflects what would happen to his mother. He attempted to deceive Sae-byeok by swearing on his mother in episode 2, and he probably regrets it now.