There is a basic level of documentation you should have about your start-up (walking around deck) that being said I have sat on the side of the large company brand not in marketing but within a role that had many companies pitching us with information. You don't want to make something for a big company that you yourself don't use or believe in; I would be honest vs. just making up a bunch of slides that in the end will not truly represent who you are or how you work.