Hmm... maybe. I downloaded the same version of ED The Musical you're talking about and, to be honest, thought it was a bit crap. Didn't like the songs and thought it was terribly forced and unfunny. I'm not averse to maybe having a disc devoted to it in the set, with the featurettes from the website and footage of Bruce's NY Q&A.

Incidentally, this was the idea I'd had for the structure of the set:
Disc 1 - The Evil Dead with original mono sound and blue-ish colour grading
Disc 2 - The Evil Dead extra features
Disc 3 - Evil Dead 2 camcorder footage/workprint
Disc 4 - Evil Dead 2 extra features
Disc 5 - Army Of Darkness Sci-Fi version and a couple of other bits
Disc 6 - Cut scenes, trailers and more for the Evil Dead games

Maybe with some instructions on how to make cool cabin packaging? ;-)