There's a location at 00:15 - 00:17 that is large and very sparse. It looks pretty terrible too. They've shown it in a couple of trailers and it always sticks out to me and makes me wonder why it was designed the way it was.
I think that's one of the first stages, and looks like it was designed to introduce the player to the cat suit. It too big and empty for normal Mario, and the inclusion of the bunnies to chase and catch makes it look more like a playground/training area for Cat Mario.