I would prefer that the Predator retains its apathetic attitude towards humans, viewing us as mere animals who's only use to them is sport. This premise is unique and terrifying, and it would be a shame to abandon it in favor of Predators with altruistic intentions for humanity. While it's reasonable to assume there are many Predators in the galaxy, some with radically different views on humans, showcasing these perspectives might not necessarily benefit the franchise. Like
@BigDaddyJohn said: ''It could open a box that may not be easy to close afterwards''. Introducing a "hero" Predator who protects humanity in a successful film could set a precedent, leading to this version of the Predator dominating the big screen moving forward.
That said, I'm not opposed to something like Scarface. A protagonist Predator who, while acting in its own best interests, happens to benefit humanity indirectly. However, I don't want to see a movie where a Predator teams up with humans and consciously fights for the good of humanity, whether or not this aligns with its own interests.