Recently in the eschatology debate section I realized that Christ's high priesthood seems to be a powerful factor in determining whether or not Full Preterism is true.
If Christ is no longer ruling as Son of God, as
1 Cor 15 says He will do so until all enemies are beneath his feet, then He can no longer be high priest either. He is priest while on the throne.
So, if he has to be high priest now, then that means
1 Cor 15 is not fulfilled yet.