He'll do it. Gathering the Black King set, the Golden Cudgel pieces and completing the 72 Divine Transformations will put him into the realm of transcendental beings and give him the power to kill both Gods and Demons. I think only Hermes and Athena can be deemed safe at this point since all the others are either scared of him or despise him, and Agares is just creeping so MC will make light work of him when the time comes. The only real mysteries to me are the character "all for one" and his role in the story and the guardians regulating the tower.