4. Calendar Man
Rocksteady Studios
First Appearance: Detective Comics No.259, 1958
Traits: Obsessed With Dates, Inventor, Mastermind It's sometimes easy to forget that Batman is supposed to be a genius detective. Every Batman game so far has focused almost entirely on his combat and stealth abilities, with the detective stuff sidelined. The Arkham series made an attempt to bring detective work to the series, but it pretty much just entailed following a scripted sequence and finding bright, glowing clues on the floor. Games like Ace Attorney and Divinity: Original Sin have proven that it's possible to convincingly let a player solve a mystery, so why has a Batman game not really done this yet? Calendar Man would make for a fantastic main villain in a video game that focuses on Batman's sleuthing abilities. While not as well-known as the Riddler, the mini-series Batman: The Long Halloween demonstrated that the Calendar Man could be a surprisingly creepy, Hannibal Lector-esque character. With his obsession with murders taking place on particular dates, the Calendar Man would be perfectly suited for a video game that brings back the World's Greatest Detective.