Doctor Crane looked out over Gotham City from the roof of his hideout, the now-abandoned Arkham Asylum. Soon, all of this would know true fear, including the Batman. The grounds had long since overgrown from years of disuse, and one could still see where Poison Ivy's plant had overtaken part of the island. Arkham still bore scars from the Joker's takeover, and fortunately his men had reported there was no sign of Killer Croc in the sewers.
Scarecrow retreated back into the Arkham Mansion for now, where he'd set up shop. His toxin was almost ready, as the unfortunate punks looking for easy looting had the misfortune to find out. Now, he just had to prepare for his guest, assuming he showed up.