PREY

[The G-man]

and how about 'The Emperor' or a Rancor? 

[Xenokiller]

Cloverfield monster and it's parasites

[b-raz]

Terminators
The Punisher
Rambo
Blade and Vampires
Spiderman
Wolverine
Master Chief
Elites, Brutes
Solid Snake

[DoomRulz]

Chuck Norris will kill the predator by snapping his fingers, the pred won't even have time to look at him.

CHUCK NORRIS FTW lol

But realistically...I'd like to see the Terminator take on the Predator, in all its variations i.e. T-1000, TX, and the 800 model.

[happypred]

Jason Bourne

[XENOWARRIOR]

Jason Bourne

that be cool, in my mind that be cooler than bond

[Creeper The Rouge]

Creasy-Man on Fire

[XanltheCSG]

to many to name  id like to see what would happen

[DoomRulz]

GREASED UP DEATH GUY

[Xenokiller]

The jedi and Sarlac,