As we learned early in the manga, Project Spearhead was originally a program that created the Mod-Souls in order to increase hollow-elimination rates by the Soul Society (as the number of hollows generally outnumber those of the Shinigami). However, Central 46 ordered the project terminated (along with all mod-souls and data regarding them destroyed) supposedly because they were meant to reanimate human corpses to fight hollows and were therefore "inhumane." However, if Central 46 had known this was the case from beginning why did they wait long enough for the mod-souls to be developed before terminating the project? Additionally, even if using human corpses were unethical gigai could simply be used as substitutes for the mod-souls to use for fighting hollows. This has lead me to believe Central 46 had some other reason for cancelling the project. What do you think?