Andrea,
Here is my opinion on the matter ..... if you want to do this and share it when you're done ..... then get cracking ..... LOL. In the end, it's your project and you will always have some takers and some passers. It's the nature of it all. Companion discs can be great for projects as it keeps continuity with the set.
Cheers for doing what you're doing .... and remember, have fun with it.
:)