Previously Vanillaware developed Dragons Crown, and many other games, while Atlus (developers of Persona) tend to publish them, but this time it appears that both companies are part of the games development instead.
Atlus teased the reveal on this website, which you can see a screenshot of below.
Outside that teaser, we don’t know anything on the game, but we will find out tomorrow! There will also be a NicoNico Livestream of the reveal, so if you can’t wait for us to report on it, you can watch it there. Better spruce up on those Japanese skills though! As for those of you who don’t watch it, we will keep you updated so keep an eye out [winky face]