I noticed this the first time I saw the new trailer..... At first I figured it was a Monsters Inc. World because of the rails and what looked like doors (like that scene in the Monsters Inc. movie near the end). Unfortunately, I don't think this is the case, because instead of doors, it looks like..... Presents? Please look at the trailer from 5:45 and you'll know what I mean. Also, it says, "5A" on the wall, what does that mean? I can't put together a possible world for this place, so your thoughts and comments would be greatly appreciated!