Here's a preview of Crania laying Quetz's eggs, we have seen this pose before. I figure Crania does this so often that she tries many different poses to add variety.
There's a minigame here, each egg causes her to micro-orgasm which creates a wave like attack just like in ROAG that need to be directed to enemies trying to stop her. The idea is to let you play the minigame but also give you this scene as an unlockable so you can enjoy it without worrying about the enemies later. The plan is to allow you to do this on both the free mode and movie mode.
This pose was already designed, but the eggs were redesigned to better match Quetz's "holyness", each egg contains one or more souls after all, other oviparous enemies, from regular to gods, will be able to impregnate her resulting in a variety of colors and shapes of eggs.