Ok, I am a HUGE Predator fan (you can ask MistaSilentKiller and Bender18). But personally, I think Jason has predator beat. Predators are very logical. Therefor, they would see him as dead once they "kill" him... Jason now has the ability to kill the Predator without is suspecting. Trained killer or not, you can't kill Jason. HE IS NEVER DEAD. That's like a computer seeing a 2 in 0100100100101100100100101001011010... However, I do think Predator will definitely bring Jason a can of whoopa** and I mean that. But in the end Jason is going to take that Machete of his, and bury it into the Yautja's skull. Long story short, if Predy wants to stay alive, stay the f*** up in the sky.
mind you everyone assumes fights are always to the death, in comics they're always about winning the battle. Having no utter possibility of loosing because his power is "I cant die" kinda takes the fun out of such delightful battles.