We were thinking the pitch deck is the summary / presentation of a "business plan." We want to have a comprehensive back-up file that contains all our findings in the pitch deck and the corresponding support for those findings plus supplemental findings should investors want it..
Sure, I think it'd be fairly common to make your business-plan available to investors upon-request. (These are a big topic, I'd recommend grabbing a "how to write a business plan" book from your local bookstore...the kind with lots of examples inside). Besides that, I don't think you need to go too far outside the box here; typical stuff like cap-tables and earnings reports should do fine. You just want to document anything important that has changed since the business-plan phase.
I would shy away from writing a "dissertation" though, I think most investors would prefer the majority of your time and effort go towards the product instead. They're going to conduct their own market research and such independently regardless. Also...people don't read. So the shorter your message, the more likely they are to actually ingest it.
