I personally think that Fox never really tried. You could argue that they gave a lot of money to Shane Black for The Predator, but he was the wrong guy for the job. They thought throwing money would be enough without knowing what the franchise actually needs. They thought a Predator "Kiss kiss, bang bang" movie should be a good idea. I remember the CEO of Fox saying "The script read nothing like a predator movie"... I mean... there you go.
Predators was alright, but after a promising 1st act failed to deliver the adrenaline-pumping thrill we had in Pred 1 and Pred 2.
I believe a good, even great Predator movie can be done, if they actually hire a guy to write the script, who actually cares about the property. How can you show that? Well, do the obvious thing everybody wants and nobody has done so far: set the frickin' movie in the future. It's not that hard.
I'm not sure this video got posted already, but something like this would be great, i'm very confident:
https://www.youtube.com/watch?v=oIYymGIhMPE