Finally they are getting back to some of the original concepts Ridley Scott and Giger wanted to go with but the producers at Fox at the time concidered to crude and shocking - that being the original egg design, the top, opening up like vaginas. You can clearly see the seem where the opening will be should some hapless victim happen along, the egg top would open up in essentially two top-halfs instead of the classical four-way "leaf/petal" formation as we have been already accustomed to.
I would like to see how the eggs bio-shape firstly creates the vagina-like appeture for whatever smaller proto-facehugger to errupt from or, dare-I-say-it: be "birthed" from. Then how they presumably transmutate from two sides to the more familiar four sided opening and why its bio-nature felt the need to transition from two to four. It could even be a genetic spin-off from the four petaled Xenomorph eggs!