So, it seems that the final battles will be savior vs. savior. The savior of the younger son lineage champions faith in life and the decency of humanity. The savior of the elder son lineage champions imagination and the evil of mankind. The champion of the So6P's vitality sees salvation through that vitality and will, and the champion of the So6P's eyes sees salvation through the gifts of those eyes. Each believes in his cause and believes he is working for the betterment of mankind.
The black and white moral high ground of this manga has become awfully gray as of late.