For those who don’t know or maybe forgot, the program consisted of a series of secretive and highly unethical projects to create an army of super soldiers for the United Nations Space Command (UNSC) during the Human-Covenant War that at one point involved kidnapping young children who were orphaned by the war and forced to undergo a series of the experiments and modifications to become larger, stronger, and faster soldiers.
With John-117 being the central character of the upcoming series, the show will have to take some time to explore his origin as well as the creation of the SPARTAN-II project, as difficult as that may be to watch.