“The game is a 3D dungeon crawler RPG and features two plot lines: Goddess and Devil King. Gust worked on the scenario for Goddess, while Nippon Ichi did the Devil King scenario.”
I can only find the same smallish image and info on various other sites on the web (including Japanese sites), so I haven't been able to work out much more than Kotaku has, except that it appears to feature characters from all three companies' games. I think.
That said, it sounds kinda fun. Since Nippon Ichi has released games from each company in North America (and some of Gust's and their own in Europe), here's hoping we see a worldwide release eventually. In the meantime, the Japanese release date is set for an unspecified August date.
What do you think? Win or fail?