While I voted for a few books, it was a pretty limp vote. I'm actually okay with not pushing more "core" content out. The really good stuff from earlier editions has made it in. Well, except psionics, which I'm not entirely convinced of either a) it was as good as my nostalgia remembers and b) Mearls thinks of psionics even remotely in the arena that I do, so it might be better left dead.
I think that we'll eventually see enough worthwhile content from Unearthed Arcana (the digital version) along with the supplemental stuff from things like PotA to bind and publish in the same way the the original Unearthed Arcana was done. I also think there is room for more monsters with stats. I don't think there's room for more than one or two more books, though.
I'd like to see Oriental Adventures redone, though. I happen to like the core of D&D being pseudo-Medieval European -- or, at least, descended from its fictions. At the same time, there are a lot of great stories to be told around Eastern history/fiction. Publishing an OA book would create an implicit division between the genres for those who want it, but allow people to blend them, too. Personally, I'd be okay if the new Oriental Adventures book was a full-on PHB that did not require people to pull out the base PHB to get various rules bits. I could see some strong disagreements about that, though.
I loved Deities and Demigods and Manual of the Planes, back in the day. To be honest, I'm not overly fond of the Great Wheel, anymore. In fact, I really don't like it at all. I could handle a book that provided a framework for building your own cosmologies, but that would be counter to the renewal of the Great Wheel. For DDG, I'd also rather see a toolkit than what was provided in 1E.
I didn't care for the Survival Guides, but I wouldn't be opposed to something that endeavored to fill the DM side of that niche (world building) better. I don't know how well it'd sell, though. The player info in those books (mainly proficiencies) has been incorporated into the core rules and improved.