Technically none of the World of Darkness properties are intended to be crossed over even within new/old, people have done it since forever but there's visible Frankenstein stitching and bolts because they weren't written that way.
Innocents is intended for playing teen/YA horror with stakes the child characters can approach dealing with, not "rocks fall, everyone dies" or "someone else deals with it for you" which seems to be what you're setting up here.