What about Howard The Duck?
We actually discussed this in the other thread. I'd vote for both Royce and Isabella if I could, but Royce for certain.
This would be the most logical reveal. If Royce survived this long, it would mean he has been killing Predators on that hunting reserve planet for years... a True Predator Killer ... substantial enough for the honorable Yautja clan to notice, realize he deserves his freedom, and come to the conclusion that he can help teach the human race to defend themselves from any dissentient, blasphemous Predator clans if necessary. This would have been an A ending in my book.
Or an A+ if this happened:
* this is not a Shane Black cameo Huggs
- Quinn Mckenna : (slightly mocking) You're the "Predator Killer"?
Royce punches Quinn in the jaw, sending him tumbling to the floor.
Royce: Shut the f*ck up. I'm talking now. And you all need to hear this.
-Cut to Black-*
Royce wakes up suddenly and assaults the science personnel that are working on him. As the guards move in, he takes one down and grabs his weapon. A stalemate ensues. The guards are screaming, but Royce remains silent. We see over McKenna's shoulder as he walks towards Royce, then stops.
McKenna: "who the f*ck are you?"
Focus on Royce's face as the predator bongo's slowly begin and we cut to black. The fading echo of the drums carrying us off into nothingness.
Well if you guys like that... and considering that this is a film about genetic engineering then get ready for the big reveal
The fugitive Predator was Royce! He was genetically altered/mutated into being a Predator. Just like that dude become a bug in District 9. Oh you f**kers know that Neil blomkamp had to have whispered something in Black's ears.
Although really, if we were going to go to the shared holy f**k universe there was only one real choice. One that could have at least made some sense. It should have been an engineer inside of his sleep pod. Yea boy, let's get Prometheus all up in the house!