I don't know what to make of this ... something interesting or just a bit too out there to want to attempt. See this is the kind of game I could see playing with my own kids as a family RPG. Might be interesting. But from how the developer teaser is worded it sounds like its geared towards adults and RPG nerds at that. So I don't know how much mileage I'd get out of it for a game for the kids, I'd be better off hacking another system and just doing a sandbox game for them. As for me I don't know if this would be something I could reasonably get a group of gamers together to try ... even for a one shot ... lol. Here is a blurb from the Studio 2 page.
"All of the familiar characters from the Land Oz are in Oz: Dark & Terrible, with one exception. The Scarecrow is an Anidum; a creature containing a person's soul that has been transplanted into a mannequin, while the witch responsible walks around in the Husk with all its memories. The Tin Woodsman is a retired member of the Wizard's "secret service", the Tin Men, who ensure the citizens of the Emerald City remain loyal to their ruler and are willing to use whatever means necessary to achieve their goals. The Cowardly Lion is a disgraced exile from his rightful kingdom after his father betrayed the other Animals in a catastrophic battle against Blinkie, the former Wicked Witch of the South, who refuses to be like other Carnivores who eat the hearts of Humans to gain lycanthropic powers."
For sure an interesting concept though, I'm tempted to pick it up just to see the mechanics and the game itself, I'm sure it would be interesting if nothing else.