After having reserved the URL's last week, Gust's Atelier Sophie is confirmed thanks to a big splash in next week's Famitsu magazine. It will be heading to all the PlayStation Platforms at some point. Tecmo Koei, which I think now owns Gust, will publish.
UPDATE: Here's the first teaser video
There's not much info in the article, but expect the next Famitsu magazine to cover all the details, for now enjoy a little artwork, with a couple of screens in the article.