Finally, we have word from the band's site on the activity stop (or hiatus). You can read it here.
CD Japan now has preorder up for the new album, "Versailles". The Japanese description states:
The last album, "Versailles", to be released by Versailles before they go on hiatus after their performance at NHK Hall on December 20th.
You can preorder at CDJapan:
**EDIT: Changed the wording to stop confusion, I realised how "activity stop" sounded. It is hiatus, NOT disbanding. Completely different words. Sorry about that! ( ノ__;)