DUDE!!!! I freaking love this!!!!
In the Latest issue of the comic a few ppl have made comparison to the Monster in the Cave to the Xenomorph from Alien.
While in its own way the Xenomorph is awesome, I think i would suck as a playable character. they best option would be for the Predator to be playable. IMO bc the Predator has more of a story to build off off while the Xenomorph doesn;t necessarily have a complexing story. (Theyre laid, the face hugger attaches itself to a host, the host is the vessel for the egg it lays, the host dies when the egg is mature and then it ages quickly and causes chaos and mayhem.)
Predator on the other hand you can make up a good story for him even if its not apart of the story mode. The Predator was somehow transported to Outworld during all the chaos of the Netherrealm War. Stranded, the Predator made sport of Outworlds indigenous species hunting for game and to survive. The Predator claimed the jungle of Outworld in his time there. Stories from Natives of the Ghost of the Jungle have spread. The Predator now made his Presence known to all realms and Participates in Mortal Kombat to the Trophies of all Trophies!
IDK...but i think you catch my drift!