The LEGO Batman Movie: Batman mentions the Suicide Squad when Barbara Gordon demands he teams up to take down Joker and the Uber Villains. He also makes a jab at the same team in the same scene when the villains offer to help.
Batman: What am I gonna do, get a bunch of criminals together to fight the criminals? That's a stupid idea!
The LEGO Movie 2: The Second Part: Harley Quinn from the 2016 movie has a cameo in Batman's Apocalypseburg bunker as she tells Emmet that his plan to travel to the Systar System to rescue his friends is a suicide mission.
Captain Laserhawk: A Blood Dragon Remix: The Warden’s Ghost is conceptually the same as the squad - a gang of prisoners forced to work for the state or have their heads blown up by intercranial explosives.
Rick and Morty In "Vindicators 3: The Return of Worldender", Morty mentions expys of Katana, El Diablo and Enchantress.
Teen Titans Go!: In "Rad Dudes with Bad Tudes", a sticker of a shirtless Joker and Harley Quinn can be seen.
