Great find. Jeez, it's really getting confusing, trying to sift through "this will knock your socks off!" and "Project X," this, and "secret announcement" that. Since Obsidian Entertainment is a Western developer, I suppose this is exactly what the Sonia Im tweet was about all along. Just a guess.
Given Obsidian's area of expertise, I wonder of Square Enix hasn't given
Fortress (a rumored action sequel to Final Fantasy XII) to Obsidian. Ah! 'Twould be strange to rip the property from Matsuno like that, though, wouldn't it? Or perhaps Matsuno would still be brought on for some kind of scenario and world consulting.
Since Square Enix already gave Fortress to a Swedish developer that went belly-up some time ago, this kind of property passing has already happened. Something similar has occurred with the Front Mission series IIRC. There's probably no info regarding Matsuno's relationship or lack thereof with the Swedish development studio assigned to
Fortress, but it might be worth looking into for kicks.
Hmm! I wonder...if an established and successful Western studio were interested in developing a
Chrono, would Square Enix assign that property to them?