Square Enix has not yet formally announced an availability date for Chaos Rings II. But the official site for the game's theme song Celestial Diva was a bit more forthcoming.
According to the site, the RPG sequel will be released this month. The iPhone/iPod Touch version will cost ¥2,000. The iPad version will cost ¥2,200.
Here's a trailer for the theme song, and the Tokyo Game Show trailer for the game itself.