Forgot to mention this, re: Us, since I know there's been a lot of confusion regarding Blumhouse's involvement (including on my end). I looked into it.
While Jason Blum was a producer on the film, Blumhouse itself did not produce, either literally or symbolically. This means that *if* Us were to appear, this year or in the future, it would in no way be part of a Blumhouse-branded maze.
I think it's more likely one or both coasts would team with Jordan Peele to create an "original" maze that would leverage Peele's personal brand (and possibly even his likeness & narration), i.e. Penn & Teller or Danny Trejo/El Cucuy.