We’re less than three weeks away from Mortal Kombat’s extremely promising return to form, and many gamers are chomping at the bit to start ripping heads off like it’s 1993 all over again. If you’ve had a chance to check out the demo, you've probably already noticed its great controls, beautiful stages, and cringe-inducing violence. With a roster of series greats and the return of many elements that made the series infamous, fans have a lot to look forward to on April 19th. Read on to get up to speed on all things Mortal Kombat.

The Story of Mortal Kombat
The Story
Mortal Kombat has always focused more on colorful characters than a particularly deep narrative, and this new entry will tread familiar ground. Rather than continuing past the events of the PS2/Xbox-era entries, this one is looking to the past in more ways than just gameplay. Here's how series co-creator Ed Boon describes the plot in an interview with IGN:
Raiden is about to be killed by Shao Kahn, and just before he delivers the last blow, he [Raiden] sends a mental message to his earlier self, and the camera rewinds back to Mortal Kombat 1. The Raiden from Mortal Kombat 1 then gets the message and experiences a premonition. The game then spans Mortal Kombat 1, 2, and 3, retelling the story with an enlightened Raiden who has changed the course of events. Eventually, everything you've seen happen before – Liu Kang winning, the guys turning into cybernetic ninjas, has been altered. You might see a cybernetic character who wasn't before, and a different version [of events].
This retelling of events explains why the whole roster and numerous classic stages from MK 1-3 make their return in this new installment. Speaking of classic characters...
Mortal Kombat has always focused more on colorful characters than a particularly deep narrative, and this new entry will tread familiar ground. Rather than continuing past the events of the PS2/Xbox-era entries, this one is looking to the past in more ways than just gameplay. Here's how series co-creator Ed Boon describes the plot in an interview with IGN:
Raiden is about to be killed by Shao Kahn, and just before he delivers the last blow, he [Raiden] sends a mental message to his earlier self, and the camera rewinds back to Mortal Kombat 1. The Raiden from Mortal Kombat 1 then gets the message and experiences a premonition. The game then spans Mortal Kombat 1, 2, and 3, retelling the story with an enlightened Raiden who has changed the course of events. Eventually, everything you've seen happen before – Liu Kang winning, the guys turning into cybernetic ninjas, has been altered. You might see a cybernetic character who wasn't before, and a different version [of events].
This retelling of events explains why the whole roster and numerous classic stages from MK 1-3 make their return in this new installment. Speaking of classic characters...

The Roster
This new Mortal Kombat brings together a dream team for longtime fans of the series, just as long as you forget about Stryker's inclusion. Every confirmed character has been from the first three games, although an altered version of at least one character will appear if a supposedly leaked image is to be believed. Here's what we know about the roster thus far:
Confirmed
Liu Kang
Scorpion
Sub-Zero
Johnny Cage
Kano
Raiden
Sonya Blade
Baraka
Cyrax
Sektor
Kung Lao
Mileena
Kitana
Reptile – Unmasked version.
Ermac – Features his appearance from the 3D games, not the color swap version from Ultimate Mortal Kombat 3.
Stryker
Jade
Jax Briggs – Equipped with his metal arms that debuted in Mortal Kombat 3.
Kabal
Quan Chi – Only confirmed character who didn't appear in one of the first three MK games.
Nightwolf
Noob Saibot – Able to split apart and double-team opponents.
Shang Tsung – His young version has been seen in action, and his old version has possibly been seen in the background of one image.
Goro (not confirmed to be playable)
Shao Kahn (not confirmed to be playable)
Kratos (PS3 exclusive)
Likely
Sheeva
Human Smoke
Cybernetic Sub-Zero
Rumored DLC
Scarlet – Red version of Kitana/Mileena/Jade, first appeared in a glitch in Mortal Kombat II.
Kenshi – Blind ninja who appeared in several of the 3D installments. Possesses telekinetic powers.
Kintaro – Four-armed sub-boss from Mortal Kombat II. Essentially a tiger-striped version of Goro.
Read on for info about Mortal Kombat's gameplay and gruesome Fatalities.
More screen shots as well as some further information can be found by the source below.

Source: Game Informer