I think Murdy specifically mentioned a rap at one point, and he does have a thing for metered Rhyme. IDK, just seemed like a natural fit for a collab. IDK, I realize it doesn't make sense to do that for a zone, but it'd be a fun element to weave through the gauntlet.
I think Blumhouse 2 last year might've been the Hello Dolly of synergy houses, if only because it was so low-rated that it might've killed off the idea for now. That having been said, Us is a legitimate cultural phenomenon on Twitter and elsewhere, so I think here, there's a happy confluence of "good for brand-building" and "legitimate fan demanded property" that makes it more likely than, say, Blumhouse vol. 3 featuring Ma, The Hunt, and whatever they have coming out in the summer. Imma bet that Tethered jumpsuits and scissors are gonna be the "Harley Quinn cosplay" of 2019's Halloween, IE every damn couple on Instagram dressing up as it.
And Blackface/Sambo mercs. Granted, they sanitized it (no pointy hoods, only blue faces), but the commentary was there. They even gave the Nazi leather-guy the armband! Us would be even easier to sanitize. It's not like the Tethered were waving communist flags or something.