Banned In Australia: According to this article, Australia's censors have banned the game due to the graphic violence in the fatalities. It's banned to such a point that they have the border patrol on the lookout for attempts to import the game. This could have been averted if they bit the bullet and introduced an R18+ for games, but that's a contentious issue.
It's also Banned In Germany. However, importing "banned" games isn't a big problem here.
Sheeva's ending in the game pokes fun at this controversy.
Canon Name: The bios and vignettes reveal at least three of the Lin Kuei's real names: Bi-Han (Sub-Zero the elder/Noob Saibot), Kuai Liang (Tundra/Sub-Zero the younger), and Tomas Vrbada (Smoke).'
"Portal Kombat": The release date of the game itself, simply for coinciding with that of Portal 2's; the temptation to switch out the "M" in "Mortal" for a "P" proved to be too great.
Scorpion and Noob Saibot's second fatalities and the latter's Babality wouldn't seem too out of place in the Aperture Science Enrichment Center.
Gravity Squeeze for Ermac's "Cannonball Slam" X-ray Move, due to its aesthetic similarities to Magneto's Level 3 in MvC3.
Kittentaro: Kintaro's more feline appearance in this game (he more closely resembled a tiger in Armageddon). Can also be applied to his Babality.
Mortal Kombat 9 itself is a Fan Nickname, as the game's official title is Mortal Kombat. Depending on what community you're a part of, Mortal Kombat 2011 is also a common nickname.
Thunder Idiot or God of Blunder for Raiden due to his many What an Idiot moments throughout the game.
Raidude (used by Johnny once in Story Mode) also seems to be picking up in certain circles.
Flip Flop of God: In development, earlier reports noted that the Sub-Zero in this game was Bi-Han, the elder Sub-Zero. Sub-Zero's vignette and combo video shown that it was Kuai Liang, the younger brother instead, once again taking up his brother's title and out for Scorpion's blood. In the end, both Sub-Zeroes (and Noob Saibot), in a way, made the cut for the game, and none of them remains as human Sub-Zero: Bi-Han is killed by Scorpion and turned by Quan Chi into Noob Saibot; and Kuai Liang, the Sub-Zero of the roster, is turned into Cyber Sub-Zero. There's even a battle between them at some point. Of note is that both Sub-Zeroes have different costumes, and Bi-Han's one is the alternate.
Reprising their roles from Mortal Kombat Vs DC Universe are Tom Choi, Richard Epcar, Patrick Seitz, Jim Miller, Dana Lyn Baron, Ron Banks, and Michael McConnohie as Liu Kang, Raiden, Scorpion, Kuai Liang!Sub-Zero, Sonya, Quan Chi, and Kano. McConnohie also voices Ermac, whereas Seitz and Baron get another role in the form of DLC characters Freddy Krueger and Skarlet.
Andrew Kishino (Koki, Yuri Solotov) voices Shang Tsung and Sektor.
Jeff Pilson (Foreigner bassist and former Dokken and Dio bassist) voices Johnny Cage.
Ken Lally (The German) voices Smoke, Goro and Shinnok.
As usual, series co-creator Ed Boon moves his chords for Scorpion's iconic "Get over here!" and "Come here!" quotes, as well as voicing a few minor background characters on the side.
Seeing as Deception's Konquest mode established that Kenshi (the blindswordsman from Deadly Alliance and one of the few Ensemble Darkhorses from the post-MK3 era) had been around since the time of the first game (he had apparently Missed the Call for joining the tournament, and thus missed his chance to enact his revenge on Shang Tsung), many assumed that he had a good chance of making it onto the roster here. He was confirmed asDLC.
There had also been a fan theory since the time of Gold (thanks to Cyrax'sending) that the Lin Kuei's ranks do not consist exclusively of Chinese people (or those of Chinese ancestry in the case of the Chinese-American-Cyromancer Sub-Zero bros., who were taken to China against their will by their father). Smoke and Cyrax's bios confirm this to be true; the former hails from Prague and is named Tomas Vrbada, while the latter is Motswana and was recruited to join the clan (so... Slavic and African "ninjas"?).
Jossed: It had been assumed for years among the fandom that Jade's parents were Edenian nobility, thus explaining how she and Kitana were so close during their childhood and beyond. In reality, Jade was actually offered as a tribute to Shao Kahn in her infant years, where she was raised alongside Kitana as one of Kahn's assassins.
The Other Darrin: Most of the VAs for the MK side from vs. DCU return here, with a few exceptions:
The Announcer: Herman Sanchez (the announcer in the main series from MK4 up to Armageddon and vs. DCU) —> Jamieson Price
