The Batman Who Laughs
Ok, so maybe it’s cheating to include another Joker-esque character as a guest character, but what Mortal Kombat fan wouldn’t want a hyper-metal take on an evil Batman to play as?
A multiverse offspring of Batman and the Joker, The Bat who laughs has all of Batman’s cunning paired with Joker’s love for chaos. None are safe from his ruthless carnage, and he loves nothing more than to dominate and grind down any and all adversaries who try to stop him.
Given his multiverse origins, his appearance in Mortal Kombat’s universe wouldn’t be any stranger than the Joker’s. Likewise, his penchant for violence would make his performing fatalities and brutalities on others feel somewhat natural, or at least as natural as any other character in the game doing it.
And that’s to say nothing of his potential move set. In addition to being able to fight like either the Joker or Batman, he could call on his pack of feral Robins, twisted versions of other heroes, and any number of other warped monstrosities to do his bidding for fatalities, all with a heavy metal aesthetic added in for style.
