Batman / Maxx: Arkham Dreams #1

When a devious new doctor at Arkham Asylum conducts unconventional forays into the human psyche, he kicks off a disastrous chain reaction by experimenting on Arkham’s newest patient: The Maxx!," reads IDW's description. "The city of Gotham soon begins to merge with the Outback, The Maxx’s psychedelic mental landscape. It’s up to Batman to save Gotham and all of reality… but only by joining The Maxx on a trip into the darkest depths imaginable: the twisted minds of Batman’s greatest enemies!