On Alien/Predator? No. Just because its science fiction doesn't mean one can do anything. But in that case its quite easy to make the AVP movies fit in with David creating the alien. Just asspull timetraveling to explain any inconsistencies on movies or EU. Yay.
Besides Newt and Ripley died. Its wouldn't be just time travel but alternative timelines as well. At least this didn't happen.
It's make believe. They can literally do anything.
It's Fox/Disney's decision, yes, they can and will do whatever they want, there are no limits in a fictional universe. That doesn't mean they should.
To quote someone's uncle... "With great power comes great responsibility"
They tried something new, a lot of the fans didn't like where they went with the lore or the writing, lets not forget that, reviews were poor and the casual audience wasn't impressed enough to give it good word of mouth. It just didn't work and didn't perform as well as they hoped. Even with Covenants somewhat disappointment in performance, there's a reason we're having so much alien content now and the predator stuff is put mostly on "silent mode".
IMO the retroactive lore changes didn't work here. From a simple spine and skull loving techno tribal hunter to a rioded up planet invader with a corny sense of humor. The writing was very bad, as far as my taste goes, it didn't fit in well. The ending scene was hilarious and the alternative endings were unbelievable in the worst possible way. And the setting was very dull.
This movie is weird for me. I've never disliked an entry in the Alien/Predator universe this much and I really tried to not be a part of the hate fest, I tried to like the movie but it didn't work. I either enjoyed or loved all the other movies from both franchises as well as the games, comics, novels, but with this entry, my optimism and looking on the bright side of things failed.
I know that not everyone agrees with this though, but I do enjoy AVPR more than The Predator. I have fun more with a movie that tries to be serous and scary but fails than a movie that tries to be funny and fails. I've watched AVPR multiple times, I at least find it has fun moments, but I really can't make myself watch The Predator again with the only nice bit being the lab escape scene.
P.S. Every time I see mentioned about the change to the night setting cause that's where the scary comes from, I literally laugh.