Unreleased / cancelled albums

[Gigablah]

I'd like to get some comments on inclusion of official albums that had scheduled release dates, but were cancelled (or delayed and then released under a different catalog number).

For example, KICA-1411~4 were reserved numbers for the reprints of Leaf Vocal Collection Vol. 1~4, which were never released on the scheduled date of July 26 2006 (they were all eventually released as Aquaplus Vocal Collections, KICA-1421~4, a month later). Considering that some sites still catalog these albums, I feel that we should do likewise, except with a notice replacing the usual information sheet stating that these albums are unreleased. This can be set using an additional checkbox underneath the release date fields.

What do you think?