Doesn't seem this thread is being kept up anymore as the OP has been inactive for 1.5 years, but would love to see something similar going forward. fwiw: Firefight is being released Jan 6th, 2015 And from the last "State of the Sanderson" post:
"What does this mean for future projects? Well, let me go down the list of sequels in order of current urgency.
Rithmatist Sequel. I will hop on writing the next one very soon.
Shadows of Self. (The next Wax and Wayne Mistborn novel.) I’ve finished some sample chapters of this and have a fairly solid outline. Expect to see me writing on this sometime early next year. Book Three of Stormlight. I don’t want to let this series languish with three year gaps between books, as I was forced to do between books one and two. Because of this, I’ll try to be doing them at 18 month or 24 month intervals at the most. Do note that the books, at around a thousand pages each, are HUGE undertakings. The way I write, I have to space out projects like this. They’ll be regular, I promise, but part of the reason I’m so productive is because I allow myself freedom to work on different projects, instead of being beholden to one series.
Calamity (Book Three of Steelheart.) This will be the final of that trilogy.
Elantris Sequel. (This is getting close. Should be doing this in the relatively near future.)
Legion Sequel. I have sample chapters of this done, but as it’s a side project, it can’t command prime writing time. I will probably slip it in between some of the books above somewhere, but I can’t promise when. Final Rithmatist book. (I’m not 100% sure this will be a trilogy. It might just be two books.)
Nightblood. (Warbreaker sequel.) This one is still fairly far off. Alcatraz 5. Still planning to write this. We have to find a home for the series, however, as I bought the rights back to it from Scholastic earlier this year. Within the next couple of months, my US readers will be able to buy my British publisher’s omnibus edition of the first four books.
As for non-sequel, original projects, here’s what might be coming in the future, as they stand now.
“Shadows for Silence in the Forests of Hell.” Cosmere novella set on a new world. Find it in GRRM and Gardner Dozois’s anthology called Dangerous Women, which I believe is coming out Christmastime. Read an excerpt on Tor.com.
“Sixth of the Dusk.” Cosmere novella set on a new world. Written following a Writing Excuses brainstorm. Still needs a revision, but should be released later this year.
The Silence Divine. Standalone Cosmere Novel. Modestly far off, but maybe not too far. I don’t want to be stuck writing only sequels. Though, since I did release two new books this year (Rithmatist and Steelheart) in new worlds, starting new series, I will probably wait on this one until those series are done.
The Liar of Partinel. Cosmere Novel, set on the original planet of Yolen and dealing with Hoid’s origin story. Very far off right now.
Skyward. (Working title.) Young Adult cosmere novel. In the early stages of development. Probably a few years off.
Dark One. Non-cosmere YA novel. Still haven’t been able to get this one off the ground. I had a chance, but The Rithmatist worked better, and I wrote that instead. Don’t hold your breath on this one, though someday I might post the sample chapters that I wrote a few years back.
Death By Pizza. (Urban Fantasy.) This book was fun, but not remotely good enough to publish. We’ll see if I ever get the bug to go back and fix it.
White Sand. Cosmere trilogy. Some fun things are happening here, but I can’t really talk about them right now.
And finally, media properties.
Mistborn: Birthright. (Video Game for consoles and maybe PC, cross platform.) We’re looking at 2015 for this right now. (Sorry.) The new console generation made us push it back. I’m still planning to write it, and development is still moving. It’s far from dead.
Mistborn film. Option runs out in January. I’ve had a very good experience with the producers, but so far, we do not have funding for the film. We’ll have to see where we are in another six months.
Legion television show. Lionsgate still has this under option!
Steelheart Film. I had lunch with the producer at Comic-Con. It’s still early in the process, but they’re very engaged and very excited.
That’s it for updates. For now, I should get back to work on the Firefight outline. As always, thank you all for reading!"