- Script
- Joshua Williamson (credited)
- Pencils
- David Marquez (credited)
- Inks
- David Marquez (credited)
- Colors
- Alejandro Sánchez (credited)
- Letters
- John J. Hill (credited)
- Genre
- superhero
- Characters
- Batman [Bruce Wayne]; Superman [Clark Kent; Kal-El]; The Batman Who Laughs; Commissioner James Gordon; Kelex; Alfred Pennyworth; The Flash [Barry Allen]; Hawkman [Carter Hall]; Hawkgirl [Kendra Saunders]; Green Lantern [Kyle Rayner]; Green Lantern [John Stewart]; Steel [Natasha Irons]; Wonder Woman [Diana of Themyscira]; Donna Troy; Swamp Thing [Alec Holland]; Mera; Beast Boy [Garfield Logan]; Flash of China [Avery Ho]; Raven [Rachel Roth]; Blue Beetle [Jaime Reyes]; Phantom Girl [Linnya Wazzo]
- Synopsis
- Superman infects himself with Joker toxin to go undercover with the Batman Who Laughs to learn his plans. Meanwhile, Batman learns that a close ally is one of the infected.
- Reprints
- Keywords
- Bermuda Triangle; Fortress of Solitude; Hall of Justice
Story takes place prior to Batman (DC, 2016 series) #77.