Stalker,
Undefined,
17 years ago
Waralien, you don't have to worry about going off topic, you were talking about the predalien, which is still very much on topic.
As far as whether or not a facehugger could actually implant an embryo in a predator's body, it's quite obvious that they are able to, or the ending to the first AVP wouldn't have happened (as riddled with inconsistencies as that movie may have been). Predators' mandibles are primarily used for communication, & as such, they are relatively frail. A facehugger on the other hand is quite powerful, & as mentioned earlier, once the tail wrapped around the predator's throat, it would gasp for air & have the embryo-laying tube inserted down its throat & be rendered unconscious.
As far as the physical traits the predalien would possess, heightened strength & speed would definitely be on the list, as in most cases an adult alien is physically superior to its host, meaning that it would more than likely be faster & stronger than most predators. As far as physical appearance goes, it can only be speculated about until it is seen in the AVP2 movie, as appearances in games & comics are generally considered to be non-canon, although it has been confirmed that the creature would definitely have predator-like mandibles.
Also, despite what certain people may think, the predalien is not a complete hybrid of the two species, it is merely an alien with several physical traits originating from its yautja host, its mind however operates the same as any other xenomorph.