If the Predators all looked the same, or simular, then there would be no need for any sort of face reveal. Yeah we got to see multiple Preds at the end of Predator 2 ranging in different colors and faces but they were all roughly the same set up. Going into the comics and expanded lore things get more interesting with a whole slew of different types of Predators. When it comes to a live action movie I want something different now, we've essentially seen the same face too many times now. I personally am hoping to see something crazy like the Ultimate Scout Predator for example. Give us something familiar but also very different.