The reveal in Squid Game season 1 that the mysterious Front Man was the ex-cop brother of Hwang Jun-ho, Hwang In-ho, could hint at the dark themes of season 2. Jun-ho had assumed that his brother had died competing in the Squid Game, but it turned out that In-ho had won in the past. Somehow, the victor became the right-hand man for the creator of the cruel sport in Squid Game and became responsible for leading the masked guards. Still, much of In-ho and the guard's story is a mystery, but that could all change in Squid Game season 2.
https://screenrant.com/squid-game-front-man-police-identity-season-2-story-tease/