Gah! This was one of the flaws of 'Predator 2' - the audience already knew, ahead of time, what was behind the murders, making the lead character's revelations feel superfluous. The original had the 'detective work' balance about right; Dutch was able to figure out what was going on through using basic common sense.
If it's a background character who's been piecing parts of the puzzle together behind the scenes, who's met later on, that would be better. But we don't need a who-done-it in a story where the audience already knows exactly who/what is behind all the killings.