If you guys don't mind, I just wanted give you a peak into my brain and tell you how I think the MK Universe works.
Crossover fights are cool and fun, but I'm finding it really hard to compare MK with anything since its univierse is so vague. I've found that in order to make things work, I'm having to incorperate the rules of one universe into the other, but the more I do this, the more MK's reality falls apart.
There is, however, one rule, or law, that i've found is constant in the MK universe and I'm just now realizing, and theorizing, how important and pervasive that law that is. First let me hit on the elder gods and ther funtion within the Mortal Kombat universe as it is the basis of this...what ever this is.
*Clears throat*
It was said that the Elder Gods are the true gods, the highest gods of all reality, who exist outside space, time, and well...everything. They essentially exist within their own universe,and thus the reality that Liu, Raiden and everyone else exists in, is a sub universe of theirs.
The thing that I'm realizing is that it is this sub-universe that we are crossing with other universes thus the "Law of Kombat" that the Elder Gods put in place must be taken into account if MK crosses with anything else.
(Boy, do I read into stuff or what!)
The Law of Kombat:
ALL INTER-REALM CONFLICTS MUST BE DECIDED THROUGH MORTAL KOBMAT.
Key word being mortal here. I'm starting to think of this statement in the same terms of the universal laws of our reality (google "universal laws" for more info). Basically, it is said that regardles of what you believe, or what you think, these laws are constant, always in motion, and have been since the beginning of our reality.
Apply that to MK...
At the beginning of the creation of the realms (reality), the Elder Gods decreed, or spoke into existance, (insert Law of Kombat here).
If you think about it like that, it really shines a new light on the story and can be used to explain some of the more vauge or non sensical portions of the the Mortal Kombat mythos. For Example:
How did Raiden as young god, defeat an elder god?
I believe there are also other factors but the bottom line is that when Shinnok lost his amulet in his battle with Raiden, the amulet that allowed him to skirt the "rules," the true Elder Gods' influence, the Law of Kombat, took action and leveled the play field, severely cutting their power and making them mortal. (Remember that the Elder Gods don't interfere persay, they don't/can't get their hands dirty. Also this could have been when Raiden got his first true understanding of mortals and what they go through.)
Raiden won the battle, maybe even killed Shinnok, and so Shinnok's corrupt spirit was sent to the Netherealm.
How did Liu beat Kahn?
As strong as Kahn's magic was during his invasion of earthrealm, it wasn't strong enough to overcome the "Law of Kombat" and so when it came down to it it, his immortal powers were affected and he had to fight liu as a mortal.
Same thing with Liu vs Shinnok, and so on and so forth.
With that in mind, MK Vs DC looks a little different, it would provide an explaination as to why Superman CAN'T be as super as he is in the DC universe (at least during the merger, and how all the fighter's powers can be leveled.
Whew! Long winded I know...sorry, but anyway back on the real topic.
Recap.
Magneto Vs Raiden:
Raiden would destroy Magneto. Magneto is strong not doubt; disrupting and maniplating entire planets is no easy feat, i would imagine it takes lots of focus and mental strength. BUT, Raiden is, alway will be, is a god. He is by far faster, by far smarter, and while Magnus can manipulate magnatism, Raiden can createit. Flawless victory for Raiden!
Sub vs Superman:
Sub, even at his peak, wouldn't last more than a minute against the man of steel in a fight. Though his ice powers are at god levels, all his other skills are limited because he is only human. While he can match supes' heat vision or super breath, his overall speed, durabilty, and even mental capacity is so out matached...*shakes head* The fight goes to Superman, he's just on an entirely different level than Subzero.
Goro Vs Juggernaut:
No. No! NO!! Some of you guys give Goro waaay you much credit, at least against the Juggernaut. Lets just assume Goro's strength is 4 or 5 times that of the strongest human. Juggernaut's strength just makes Goro look foolish as his is basically on the god level. Juggernaut would flatten Goro...literally!
A better fight, or at least match-up, for the Juggernaut would be Onaga w/kamidgu. Juggernaut has an artifact of the Gods, and so does (did) Onaga. You gotta admit it would awesome.
Sub Vs Iceman:
First a couple questions: Can Iceman make ice clones and fight with them? Does he have some sort of core that if destroyed would kill him? And can he travel through ice?
If the answers are yes, then I have to give the edge to Iceman. Sub's power with the medallion is impersive and I think would match Iceman's to a degree, but since Iceman can be come ice and Sub can only manipulate it...Iceman for the win.
Scorpion Vs, Aquaman:
Scorpion all the way!! EVEN in water!! He's a damn Ghost!!! A ghost that can phase in and out of phsyical space. Even with Aqua's enhances strength Scorpion would whoop his fishy ass. HAHAHAHA! Sorry.
I have more opinions but I'm tired. 'til next time!
He/She is more powerful than Goro. I mean he/she is a rock-skin pokemon with high physical resistance. Plus he/she can use his/her Rock Slide to bury Goro underground till the end of his life. Of course I believe the exact OPPOSITE 
WoW player Name:grubgrub realm:dragonmaw HORDE
