And don't double post, it spam. And as Sev Fett has said Role playing is where these match ups go.

Exactly what I was going to say. Now, this fight is almost impossible to determine the outcome of. Chief and Fett would take out the Predator from long range, and when they fight, Chief has shields, but Fett has a jetpack. They are both very skilled, although I would say Fett has more skill. Chief has super strength and better reflexes, though. I'd say it's a matter of timing, circumstance, and luck.