Johnny Cage is a movie star who throws green balls of energy who fights someone that has four arms and is part of some tournament where people that could easily kill him don't and he karate chops their head in half with one hit.
How a description of
Goro, never mind the Mortal Kombat tournament, which isn't a character but an event, wound up inside your description of Johnny Cage's character, I will never, ever know. :laugh:
"Johnny Cage is a movie star with green energy." That's it. Every single move he has can be explained either by him being a movie star (showing off flamboyantly) or his access to green energy (throwing energy balls, using it to fuel his attacks creating the 'shadow' effect). That's it. His physical appearance - suit and tie, shades, his own name on his chest, again makes sense once we know that he is a narcissistic dick (read: movie star).
"Liu Kang is a monk who throws fireballs." Every single move he has can be explained by that description. His physical appearance makes sense from that short description.
"Scorpion is a ninja resurrected as a demon." Every single move Scorpion has can be explained by that description - fire is Hellish, his swords and kunai come from his ninja heritage. The only thing you could argue isn't explained is his use of portals, but seeing as how Quan Chi also favors portals, we can assume that in the world of MK, portals and demons go together. His physical appearance is literally an undead ninja.
"Kabal is a former criminal who has super speed." That's on par with the other characters.
Now why the hookswords? That's a pretty random weapon for a criminal-turned-cop to use. Neither cops nor criminals typically use hookswords. Kano uses daggers and throwing knives like a regular murderous psychopath, why can't Kabal?
Why the whirring blades that he hurls at people? Johnny Cage, Liu Kang, and Scorpion don't randomly summon weapons to throw at their enemies. Never mind that the whirring blade isn't even a weapon that Kabal normally uses, why the hell doesn't he just throw a hooksword?
Why the energy blasts? Just because? That's just his MK9 moves, I won't even touch his moves from previous games. Now, moving on to his appearance, where did the part about being a burn victim come from? And how does a gas mask help him deal with his burns? And why does he wear a cape?
And as [MENTION=18014]theincubuslord[/MENTION] pointed out, there's even a reason why Cage has green energy. Does it bear mentioning that the origin of Kabal's super speed is completely unknown?