According to developers, the idea for implementing a role playing game (RPG)-style progression system into a fighting game had existed since before the fall of Midway Games, the original publisher for the Mortal Kombat series. Injustice 2 introduces a new feature called the Gear System, a loot-dropping system that rewards players with costume pieces and equipment that can be used to customize characters' appearances and modify their abilities and stats. The core gameplay remains similar to its predecessor, albeit with minor adjustments to returning game mechanics. A prequel comic book series of the same name, written by Tom Taylor, was also released beginning in April 2017.

Similar to the previous installment, a companion mobile app was released for Android and iOS devices. An expanded version of the game, titled Injustice 2: Legendary Edition, was released in March 2018 for the PlayStation 4, Windows, and Xbox One. The game was initially released in May 2017 for the PlayStation 4 and Xbox One a Windows version was released later in November 2017. It is developed by NetherRealm Studios and published by Warner Bros.

It is the sequel to 2013's Injustice: Gods Among Us and is the second installment in the Injustice franchise based upon the DC Universe. Injustice 2 is a 2017 fighting video game.

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