Shemp will appear in the movie as a cameo.
The Three Stooges was always Moe, Larry, Curly, and Shemp.- Jossed. They do have a guy called Teddy, though. (Most probably, a reference to Ted Healy)
The Stooges are cousins in this movie.
If you can recall Curly saying to the hospital receptionist "His mother and my mother were both mothers." It's possible their respective parents were sisters.- Not really, in the context of the scene Curly's clearly referencing Mac (And it was a joke OG Curly originally made in one of the shorts). They could still be cousins in the context of the movie canon as a whole, tho.
