It was announced on the Kalafina website a confirmation that the album will be called Seventh Heaven, named after the final Kara no Kyoukai theme: seventh heaven.
There will be 13 tracks, with theme songs from all 7 Kara no Kyoukai titles, as well as five others. There will be a special edition released that comes with a DVD containing PVs of sprinter, fairytale, and seventh heaven. Also included will be videos of Kalafina live, from two Yuki Kajiura LIVE concerts, where they performed the opening acts.
Thanks to Michelle for the translation!