The Legion of Doom spies an old witch walking through the swamp and confront her for being a spy for the Justice League. She assures them she is not and vows to give them power of great evil if they let her go. They agree and she contacts an evil demon who will grant the Legion the evil power if they give him the equivalent of good. They lure the Superfriends into the swamp and allow the Demon to capture them. He grants the Legion the power to control the dead and a zombie army arises to do the Legion's bidding. Written by
Did You Know?
After Green Lantern is captured, he still appears in the Hall of Justice when Superman goes to look for the missing heroes (it should be Aquaman in his place). See more
There's that old witch again, prowling through the swamp.
References Night of the Living Dead