Let me tell you a few things.
-Harribel (and apprently her fraccions) is confirmed alive, the only surviving espada, she was apparently healed by Orihime.
-Grimmjow confirmed dead.
-Yammy’s fraccion was his dog.
-Stark is dead
+Lilynette = 1 (Part of Starrk)
+Charlotte = 20
+Avirama = 22
+Findor = 24
+Poww = 25
+Ggoi Vega = 26
+Nirgge = 27
+Apache = 54
+Mila-Rose = 55
+Sun-Sun = 56
+Tesla = 50
+Shawlong = 11
+Edrad = 13
+Nakeem = 14
+Yylfordt = 15
+Di Roy = 16
+His own creations, N/A
+His Dog = 35
-Harribel's hollow hole is in her womb. She died giving birth which makes sense given her aspect of death: "Sacrifice"
unmasked book contents:
Character Data: Arrancar/Espada
Comic: not be, but be (Ulquiorra’s Backstory)
Battle Phase: Lists all the moves used since Bleach begun.
A Quick timeline, the new chapter and the Fullbring are not mentioned much. But it’s titled “Harycon Days”
Kon Radio… Kon being Kon I guess.
Colour Pages: Some with Ichigo cosplaying
Blood Type: Most characters and their blood types, including some stuff written up about them.
Chapter Title list
Short Story: Nestle to Night. (Yammy, his dog and possibly Harribel
Some of it was scanned.
All of this is from itsbleach on tumblr. :D
If I find out anything else I'll post.