Nightmare Fuel / Justice League: Doom

• Bane's attempt to kill Batman: Beating him unconscious, then burying him alive in his father's casket, with the remains still there.
• Ma'alefa'ak's attempt on J'onn's life. Imagine being invulnerable to fire but still feeling the fear and agony of being completely engulfed - and even throwing yourself into the freaking ocean doesn't put the fire out. Worse yet, Ma'alefa'ak expected J'onn to burn for weeks.
• Vandal freaking Savage himself. Once again showing how depraved he is like in the comics, Savage is the mastermind for all the torturous battles the Justice League has had to face lately. And he doesn't show guilt about it. Worse, he plans to force the people to kneel before him after he uses a solar flare that will kill half the population. If he managed to succeed, then humanity would certainly end up doomed.