I know the first three are Skarlett, Rain, and Kenshi. But who is the fourth character in the DLC pack?

Havok.  Just my guess.  
 
He represents the other realm that is mentioned in the game but doesn't already have any characters.  Also, he's in a character's ending movie. 

I'm expecting it to be Tanya, but I'm hoping it's Tremor.

It'll be Ed Boon himself. All of his moves involve detaching his eyebrows and clubbing you with them.

I'm guessing it is someone new.

Im thinking Fujin

Goku.

it's got to be mokap

Meat.

Fire. Presumably the guy who follows Smoke around...

@DrHawking: There is a video that has some "solid" proof that it is Fujin.

Ed Boon tweeted asking what people would think if Ryu from Street Fighter was DLC, but there's no way that's actually happening. My guess would be Fujin since there's that audio file of the announcer saying his name, but then again there's an audio file of the announcer saying Brutality and that never happened either.

I want Tanya!!! 
 
Ed Boon "kinda" debunked the Fujin video though on twitter, thought it really depended on how you interpreted his tweet, it was something along the lines of "come back in a year and tell me Fujin is in the game" something like that...

Shinnok or Havok. 

I'm thinking Fujin or Shinnok.

It'll be Ed Boon himself. All of his moves involve detaching his eyebrows and clubbing you with them.

Conan O'Brien, as he's on TBS and Turner Broadcasting Systems is a subsidiary of Warner Bros. So... its... possible....

Didn't Jeff say one time that someone from NR said that Bo'Rai'Cho's(sp?) X-Ray is extremely fierce? Hearsay from hearsay, not really sure about that and I hate that fat guy, but I thought that has been mentioned.

I'm expecting it to be someone from the Dead Alliance - Armageddon era since this game is lacking those characters. But then again I'm suspecting that they're saving those characters for the next MK since they re-wrote the stories from MK1-3 and will probably do the same for MK4- Armageddon.

@xhavoc86:

so it was Ed Boon, I remembered that so vaguely I tried to hide that with 'dude from NR' and thank god that drunk, fat, vomiting guy(he was also not a lot of fun to play in Deadly Alliance the last MK game I bought, except for the new one obviously) won't show up.

Santa Clause

I know it's not going to happen, but I'd love to see the cyborg version of Smoke added.

@Yanngc33 said:

Santa Clause

Tim Allen?

Poncho

Fire. Presumably the guy who follows Smoke around...

Tanya is my guess.   I mean her character model is IN  the game.  So only makes sense.... 
 
If I had my choice I'd really like to see Frost.   =)

I feel like it almost has to be Shinnok.

Tanya is my guess.   I mean her character model is IN  the game.  So only makes sense.... 
 
If I had my choice I'd really like to see Frost.   =)

Santa Clause

Mokap.

Khameleon.

NEVER GIVE UP HOPE.

Tanya is in the game as a background figure while some other people in the MK universe on the endings are pretty much just paintings. 
 
I'd love the 4th character to just take the dressed up Johnny Cage figure or one of the movie crew you fight in the challenge tower & just give him a few powers & call him Ed Boon. Alternatively, Mokap.

@PrimeSynergy said:

Fire. Presumably the guy who follows Smoke around...

Hahaha! Haven't laughed that hard, all day. Good one, man. Shame to all of you who don't get it.

On topic, mind; I'm thinking either Fujin, or Havik. Though I'm hoping we'll get to see Meat or Moloch.

Cyber-Cage.

@Farley_Lives said:

I feel like it almost has to be Shinnok.

Agreed.

@BananaKid said:

Khameleon.

NEVER GIVE UP HOPE.

But only in the Wii U version.

Tremor would be nice, even though that would mean another ninja.

It could very well be Shinnok or Tanya, since both their models are already in the game.

Another completely new character could be pretty sweet.

Ed Boon has tweeted that it wouldn't be Fujin.
I think it's going to be a completely new character from what I've been hearing. Maybe they'll make Hornbuckle into a real character I mean they already made Skarlet into a real character.

@PrimeSynergy said:

Fire. Presumably the guy who follows Smoke around...

Hahaha! Haven't laughed that hard, all day. Good one, man. Shame to all of you who don't get it.

I feel like it almost has to be Shinnok.

I know it's not going to happen, but I'd love to see the cyborg version of Smoke added.

Meat or Tremor please. 
Or even Li Mei or Ashrah? 
 
They'll save Shinnok for the next game, definitely.  
 
Hell, since Ed said its not Li Mei, it may just be Li Mei -__-

Peter Molyneux's balls.

@PrimeSynergy said:

Fire. Presumably the guy who follows Smoke around...

LOL. His is my favorite intro in the game, because that line mixed with his voice is just hilarious. I would personally like a new character; there are some really cool new character designs in a few of the ladder endings. I can't remember which ones specifically though.

Cyber Smoke

I want a female or new character, need more of those