Like I told you before : "The E.T. are very uncommon in the universe. In this saga, we know just two other species : Xenomorphs and Engineers. And in this book, there is another species : The Dog-Alien. Okay why not. But coincidentally, they also know the Xenomorphs"
Can you explain that to be logic in the story ?
I didn't hear anything about Fire and Stone which is canon. Moreover, Fire and Stone and River of Pain tell two different story but both are canon... How is it possible ? And even if it's written in the W-Y Report, the Fox didn't say anything about it, there aren't Predator in the Alien franchise ! If there are Predators, we can say that the tree films are canon, every comics, AVP films and everything, it's not logical...