MKWarehouse: Mortal Kombat

Downloadable Characters:

PlayStation 3 Exclusive:

Secret Characters: Quan Chi, Cyber Sub-Zero
Bosses (unplayable): Goro, Shao Kahn, Kintaro

Baraka: 2 (Default, Alt)
Cyrax: 2 (Default, Human)
Ermac: (Default, Alt, MK1)
Goro: 1
Jade: 4 (Default, Alt, MK2, MK3)
Jax: 2 (Default, Armor with no bionic arms)
Johnny Cage: 2 (Default, Tuxedo)
Kabal: 2 (Default, Alt)
Kano: 2 (Default, Brown jacket)
Kitana: 2, (Default, Alt, MK2, MK3)
Kung Lao: 2 (Default, Alt)
Liu Kang: 2 (Default, Alt)
Mileena: 5 (Default, Alt, MK2, MK3, 3rd (flesh pits))
Nightwolf: 2 (Default, Alt)
Noob: 2 (Default, Alt)
Raiden: 2 (Default, Alt)
Reptile: 3 (Default, Alt, MK1)
Scorpion: 3 (Default, Alt, MK1)
Sektor: 2 (Default, Human)
Shang Tsung: 2 (Default, Alt)
Shao Kahn: 1
Sheeva: 2 (Default, Alt)
Sindel: 2 (Default, Alt)
Smoke: 2 (Default, Regular Human Ninja)
Sonya: 2 (Default, Alt)
Stryker: 2 (Default, Alt)
Sub-Zero: 3 ((Default, Alt, MK1)
Kratos: 2 (Default, Fear Kratos)
Quan Chi: 2 (Default, Alt)
Cyber Sub-Zero: 1

Note: Classic costumes are DLC.

Confirmed by watching streams of the game

Krypt is huge with many areas, you do not only unlock tombs but also corpses.
Babalities are in and are hilarious.
Shao Kahn has all of his classic moves, he also throws his hammer and his victory pose has a blonde woman crawling to him.
Bosses have a super armor, think of SFIV's focus.
Story Mode has very short loading times.
Cyrax and Sektor's alt costumes are human.
You can either get Kintaro or Goro as a Sub-Boss.
Smoke's alt doesn't show his super fabulous hair and looks like a regular ninja (still human).
Bosses can taunt, Shao Kahn taunts and laughs.
Shang Tsung controlled by the AI can morph into multiple kombatants, not clear if the player can achieve this.
Nekropolis is where you see bios, endings, and models, it's like a showcase of every combatant and not menus like in MvC3.

Confirmed Game Modes

Test Your Might: Materials include: Pine Boards, Teak, Oak, Bamboo, Coal, Bricks, Marble, Silver, Gold, Iron, Titanium, Amber, Pearl, Sapphire, Diamond and Head.
Test Your Sight: Materials for the cups include: Bricks, Human Skulls, Severed Heads, Soul Box, Gold Bars, Diamond Bricks
Test Your Strike: Like Test Your Might but precision-based.
Test Your Luck: Also available in 2 players mode, a slot machine randomly selects kombat modifiers, can select the number of reels to spin, list of modifiers detailed below.
Challenge Tower
Endurance Mode
The Krypt
Nekropolis: You can see stats, bios, endings, music and art unlocks.
Fatality Tutorial
Practice/Training: Includes options to practice against a dummy, can customize dummy behavior, is available to practice single and tag kombat.
Offline Kombat Modes: 2 players: 1vs1, 2vs2 (tag), Tag Ladder; 3 players: 2vs1; 4 players: 2vs2.
Online Kombat Modes: 1vs1, 2vs2 (tag), 2vs2 (tag with 2nd player).

Test Your Luck Kombat Modifiers

Fight Modifiers: Cannot block, cannot throw, cannot jump, cannot dash, cannot perform special moves, cannot perform enhanced specials, cannot perform x-rays, cannot perform kombo breakers, speed increased, quick uppercut recovery, cannot perform kombos.
Meter Modifiers: hidden super meter, hidden health meter, super meter max, super meter regenerates over time, super meter depletes over time, no super meter, health meter regenerates over time, health meter depletes over time, reduced time limit, increased time limit, no time limit.
Status Modifiers: Lose health over time for the entire match, The last person hit is engulfed in flame, All attacks go through opponent's block, Directional controls are reversed, Attack buttons are randomized, Armor prevents reactions for 10 hits, 3+ hit kombos can stun the attacker, 5+ hit kombos can freeze opponents, May fall alseep every 5 seconds, Successful attacks restore health, 5+ hit kombos can cause bleeding, Attack damage is increased, Attack damage is decreased, No arms. X-Rays Disabled, Start with 1% health.
Stage Modifiers: Floor randomly becomes magnetized, Floor randomly erupts in flame, Fireballs drop from the sky, Ice projectiles drop from the sky, Homing missile will track a random player, Stage is flipped upside down, Earthquakes shake the arena, Health recovery items will appear, Super Meter recovery items will appear, Stage will darken and brighten over time, Full screen dream effect.
Fun Modifiers: Explode when defeated, All blood will be a random color, No heads: X-Rays Disabled, Turned into a zombie: Will explode when defeated, Koins awarded upon winning fight, HUGE Koin award upon winning fight.

Misc Info and Secrets

PS3 version requieres 1.55 GB of free HDD space.
Second fatalities need to be unlocked (in the krypt or by performing them)
There are Versus Kodes, unlockable at The Krypt, that actovate are kombat modifiers (like the ones in Test Your Luck)
The 300th challenge, End Game, consists in fighting Goro, Kintaro, Mileena and Shao Kahn with certain kombat modifiers, beating it unlocks the Flesh Pit Mileena Costume.
To perform a babality you must not block an attack during the match.
Choose your character with the Start button to get the 2P colors (also works with alternates).
When choosing a stage, select it with the Start button and if you hear Shao Kahn's laugh you'll hear klassic music in the background.