Here's a question...do we really want more of the D&D "brand"? Do we want D&D movies, D&D TV shows, D&D lunchboxes? Do we need those things.
A friend and I were talking about World of Warcraft the other day, and I said I only really learned to like WoW once I realized it wasn't a vehicle for telling my own stories but living the stories that Blizzard gave me. And that's fine and all, but D&D is supposed to be about living the stories I and my friends create. Yet more and more, they want to make D&D a shared experience that's the same for everyone who sits down at the game--the only problem being; from my perspective--that's a really bad experience. Pretty much everything they create to reinforce their brand--their art, their trade dress, even the way they choose to present the rules, actually adds negative value to their product.
The more they position D&D as a brand, the less interested they are going to be in catering to the kind of stories that I and other homebrewers may want to tell. While I want more fantasy movies and TV and books; I don't really want the kind of fantasy they look willing to give me.