Shooter, Swan and Klein bring back Two-Face, at least in concept, for the first time since the 1950s in World’s Finest 173 (Feb. 68).
It’s a very odd story. Superman and Batman are both asked to name their “most dangerous” foe they have ever faced. Though numerous foes are discussed, Batman picks the long-absent Two-Face, and Superman comes up with Kralik, who had never actually appeared before this story.
The real villain in the story is Dr. Aaron, who has a long standing grudge against the heroes. After learning who they fear most, he uses a psyche-distorter on them, which causes them to adopt the identities of the men they fear. In other words, Batman becomes Two-Face, and Superman becomes Kralik.
Things go haywire when Robin gets involved. He gets captured by Dr. Aaron, who then finds himself pursued by “Two-Face.”
Dr. Aaron is forced to take his psyche-distorter chemicals himself, which transform him into a Composite Superman type character, but without the powers. As well, the chemicals will kill him. Harsh. The heroes do return to normal, though.