I think it is just a breathing mask, that's all. But they tried to play around with a facehugger style and the wayland logo. For me it is very obvious that they wanted to tease a new AVP Movie with that scene. But before the production of the movie it was very clear, that Schwarzenegger didn't want to be in it. It seems that scene was for someone else. Maybe Alexa Woods?
With the Alientail-Spear we had already a reference to the AvP movies. Fox seemed all the last year to build up an AvP extendet universe. And I think they pushed for it also in the new movie, but it didn't worked out.
I think the Predator movies work very well with the Alien Franchise together. But I don't think that the Alien Movies will work with the Predator Franchise. We still have an AvP Universe and an Alien Universe separated until we see any Alien sequel with a predator reference in it.