I agree that a new movie shouldn't be about some military unit getting picked one by one like in the original.We have already seen it so no need to rehash.(Predators duh)
What IMO should have been the plot is having a rogue Bad Blood predator who has no honor and has killed other predators arrives on Earth(or maybe crashes accidentally after being banished from his home planet and goes on a killing spree).Literally no one is safe from this guy.He will kill you unarmed or if you're a woman or a child.That's when a Tracker predator goes in pursuit to kill the Rogue because he has disgraced himself and is killing unworthy prey.
There are many elements that can be picked from the 1994's Predator:Bad Blood comic which for me is one of the best ever.We would finally see a proper predator vs predator fight without any without any ridiculous super/upgraded specimens but just two classic preds unloading on each other.
Shame instead Dekker the hack cooked up a story with a Genetically enhanced predator sucking human DNA or autistic kids cracking predator
language.It could have been a great third movie.