10 Times Supervillains Killed Other Villains
4. Joker Kills Mister Freeze - Robin II: Joker's Wild
Before Batman: The Animated Series reinvented Mister Freeze in the critically acclaimed Heart of Ice, the character was treated pretty disposably by DC - and not without reason.
First of all, the original incarnation lacked the iconic design from the animated series. Some of the hallmarks of the character were present, such as the cryo-suit and transparent helmet, but he lacked the ice-white skin or the red goggles that have proven synonymous in the years since, nor the compelling backstory developed by Paul Dini in Heart of Ice.
Because Freeze was generally so forgettable at the time, even after Crisis on Infinite Earths reordered the publisher's continuity, the character was actually murdered by the Joker in 1991's Robin II: Joker's Wild #1. The Clown Prince of Crime unceremoniously electrocutes Freeze with his hand buzzer for attempting to take over his gang.
When Heart of Ice dropped the following year, winning a troff of awards and cementing BTAS as no ordinary children's cartoon, DC moved quickly to integrate the series' interpretation of the character into the comics, revealing that Freeze had actually regenerated after being stored in a block of ice.