Captain Cold
The use of Mister Freeze, Captain Cold, Icicle, and Chillblaine as a group of cold-themed villains is an ongoing theme from DC Comics seeing previous versions including a team-up by Captain Cold, Icicle, and Minister Blizzard in "Justice League of America" #139 (February 1977), the Cold Warriors in "Justice League Adventures" #12 (December 2002), the Ice Pack in "Super Friends" #16 (August 2009), and Icicle, Icicle Jr, Mr. Freeze, Captain Cold, and Killer Frost in "Young Justice" "Terrors".