Something That Was Brought To My Attention

So, from the looks of things, Luigi’s Mansion 3 is going to take place in a hotel.

How can I tell? 

Well, here’s some abandoned luggage, presumably owned by Mario:

What appear to be individual guest rooms and suites, with numbers over the doors:

And here is what appears to be a hotel check-in:

Plus, the building shown at the end of the teaser looks pretty tall. A little too tall for an ordinary mansion:

So, from what I can gather, in this game, Luigi and Mario are in a hotel (though, presumably the latter has been kidnapped again)….

Here’s a little hint, if you haven’t guessed what I’m alluding to.