She's done it way more than twice. It always signals her husband's work will be present in some form or fashion. I doubt it's a new game, given that they just finished work on X a year and a half ago. He takes four or five years to make a new game. It's probably the heavily-rumored Switch upgraded port of X. Which would be cool.
The Screamapillar is easily identified by its constant screaming—it even screams in its sleep. The Screamapillar is the favorite food of everything, is sexually attracted to fire, and needs constant reassurance or it will die.