Predators was without date and offered nothing to pin point it on, except Afganistan.
And it's ok. If I'm reading between the lines Black wants to blend all the previous titles together and perhaps offer this film sort of as a hub for the other films to connect to.
Or maybe that is just me wishful thinking.
Fox being bought up by the mouse implies Disney want to monetise all the franchises Fox owns, including Alien and Predator. This probably means some stand alone films down the line and a more proper Alien versus Predator franchise if those do well. So far Disney has been willing to bet big and win in 90% of the time.
Although I hope Disney doesn't pull those franchises through the Marvel mould. I mean, I love Star Wars and actually like what Rian Johnson did with The Last Jedi, it's the timing and length of the comedic parts that got taken a little to far if you ask me. Just a little. Solo did it better. Also, a little more time between action scenes would do any franchise good. Sometimes less makes you care about characters.