User blog comment:Kaestal/anyone else think that The Darkness is a disappointing villain?/@comment-95.112.200.213-20151223214229/@comment-95.112.200.213-20151223222729

Edit: Lucifer probably knows that the Darkness would eventually annihilate him, so at least he wants to finish what he started years ago. Even if he would try to team up with her against God, I dont think Amara would care, since he helped God during the primordial war and he poses a threat to Dean, which is certainly enough reason for the Darkness to punish/torture or annihilate him.