I really should be sitting on this news since I only have one source but it's a HIGHLY RELIABLE ONE. I couldn't contain myself.
Breaking news, credit to poppy_moon and as always, Annie:
The cover for Unmasked is ULQUIORRA. Sensei has drawn pictures of the Arrancar without their masks. There will be a spread, a BLEACH horoscope and a BLEACH quiz. The novel will be telling the continuation story of a character but we don't know which character.
Also, Ginjou is the cover for Volume 50
eta: TRANSLATION BY CEZARIA: According to the ad, there will be a never-before-published manga drawn by Kubo that tells the story of "What is it that Ulquiorra's looking at?"