You know...kind of related but not really related...I'd imagine we'd stand a bigger chance of seeing the emissaries as a special reinforcement in Hunting Grounds than their cut of the film
The game does make a big deal about wanting to capture one alive. I think the script they're in also had them on base with their own little Hunting Ground to keep them occupied. That'd actually be a cool twist for a Stargazer base map if all of sudden another Predator shows up. The Fireteam would still have to gun it down and the Predator could possibly claim it if their deemed as traitors or something like that.
I think the game also uses (or is at least a variation of) the Emissary rifle.
-Only has the rifle
-Maybe (due to wearing Human made gear) is about as strong as the Scout
Maybe that would work for Hunting Grounds.