We learn that he already knows a great deal about the Predator creatures, including that they “conquered space,” so his knowledge even goes beyond this planet.
The new trailer puts the spotlight on the character played by Sterling K. Brown, who we haven’t seen a great deal of up to this point.
He also knows something about the “other” Predator, which he calls the Ultimate Predator.
It’s existence was revealed in the previous trailer for The Predator.