Trivia: The plot of Predator 2 underwent a few changes in its earliest stages. The role of Gary Busey's character 'Keyes' was actually intended to be Dutch, Arnold Schwarzenegger's character from the first film. Arnold was very outspoken against the script of Predator 2, and felt that taking it into the city was a bad idea. He declined filling the role. Hence, Peter Keyes was created. Arnold was approached one more time, to be Keyes' assistant (a role played by Adam Baldwin), but his response was the same as the first time: no way.
Trivia: Only 2 faces were ever cast for the Predator creature. The face used for the creature in Predator 2 was new, but if you notice, the face used for the elder at the end of the movie was the same head sculpt from the first film, but with spikey protrusions and more distinguished features of age added onto the face. Both were played by Kevin Peter Hall.