She should release another single before the album, or release it on the same day.. Or maybe early March and then the album comiing by the end of March or early April. That would follow MUSIC's pattern.
I'm not sure about a single release for SONG FOR A WISH.. I would think of it as the "anata ga iru kara" of the new album lol.. Which means previously released digitaly only, then on the album.
It's just some speculations from me, I don't know if it will end up this way or not