I don't care about spoilers - if a story isn't good enough to stand a second viewing, it probably wasn't worth investing my time watching it the first time.
But, yes, avoid that site if you hate spoilers. However, I don't think what I've read there spoils the ending.According to the site's sources, and various other "confirmations", Noomi and Charlize are the only two survivors and they get confronted by a huge, and I mean huge, Xenomorph that also looks half-human. And then the movie ends abruptly.
I was under the impression that
the abrupt ending reported was due to the last 11 minutes or so of the film not being shown to press or anyone else prior to the films premiere.