Four years ago, Profil issued a box set of 20 CDs called "Anton Bruckner - The Collection" (PH 13007) which included all the symphonies and some choral works and chamber and instrumental music by the great composer.
In the not so distant future, this box set will get an "update" or "revision" as they like to call it (PH 16059). It will include 3 more CDs to become a 23-CD box set. These three CDs are Symphony No. 9 with completion by Gerd Schaller (CD13 & CD14) and Psalm 146 and Organ Works, also by Schaller and Philharmonischer Chor Munchen together with Philharmonie Festiva (CD15).
Apart from these addtions, there are changes to the recordings of 3 symphonies, the F minor ("00"), the D minor "Annulled" ("0") and No. 7. The first 2 were previously those of Georg Tinter's, with Royal Scottish National Orchestra and National Orchestra of Ireland, and the No. 7 was that of Ahronovitch's, with the Güzenich-Orchester Köln. Now they are replaced by those by Philharmonie Festiva conducted by Gerd Schaller. Other recordings are the same as the original box set.
If you already have Schaller's respective additions, which have been issued separately, to this "revised" box set, then the new box set may not be attractive to you at all.