While the Mortal Kombat series has never been shy about taking inspiration from popular culture, the last two NetherRealm games have really gone out of their way to include characters from other universes as DLC.
Mortal Kombat X’s DLC included a handful of horror icons like Jason Voorhees, Freddy Krueger, The Predator, and a Xenomorph alien who all fit right in performing gruesome fatalities.
Meanwhile, Injustice 2 had the denizens of the DC Universe squaring off some iconic characters from other comic publishers, Hellboy and the Teenage Mutant Ninja Turtles. Hell, even Kratos popped up in the 2011 Mortal Kombat. It’s entirely possible some of them will return, but who else?
Source: IGN Video Games All