Combined Detachments for Cult Mechanicus/Skitarii/Mechanicus Knights and Black Templar/Adepta Sororitas, along with Emphyric Storm rules are in the Fall of Cadia book.
from a very solid source.
via anonymous sources on Faeit 212
(some stuff is currently leaked data but with new additions as well)
Triumvirate of the Imperium - 80$
-Includes all 3 Characters within the Gathering Storm: Fall of Cadia book.
-Inquisitor Greyfax, comes with a Ornate Power Armour, Master Crafted Powersword, Condemnor Boltgun, Psyk-out grenades and the Psyocculum - the Eye of the Emperor.
-Belisarius Cawl comes with a Master Crafted Power Axe, Arc Scourge, Refractor field, mechadendrite hive and Scryerskull - He also confers the Canticles of the Omnissiah Special rule to allied units within range
-Saint Celestine with the Armour of St. Katherine, Bolt Pistol and Ardent Blade - She also confers the Act of Faith Special rule to allied units within range
her 2 Geminae Superia, Sister Eleanor and Sister Genevieve come with Bolt Pistols and Power Swords.
Gathering Storm: Fall of Cadia - 50$
-Rules for Belisarius Cawl, Saint Celestine and Inquisitor Greyfax. Celestine and Belisarius Cawl also confers the Act of Faith/Canticles of the Omnissiah Special rule to allied units within range.
-6 Relics for the Ecclisarchy usable by Adepta Sororitas
-6 Arcana Mechanicum usable by Cult Mechanicus
-Grand Convocation detatchment, which combines Cult Mechanicus, Skitarii and Mechanicus Knights
-Imperial Crusade detatchment, which combines Black Templars and Adepta Sororitas
-Triumvirate of the Imperium Formation, which lets you field Celestine, Belisarius Cawl and Inquisitor Greyfax as one Formation
-4 new Altar of War Missions
Battlezone: Empyric Storms rules. For raging warpstorm effects, like halving the range of psychic powers or even removing invulnerable saves.
Battlezone: Empyric Storm Cards - 15$
-36 reference cards for the empyric storm events, adding psychic rules and effects to the battle. Usable in any game of Warhammer 40k
Start Collecting! Deathwatch - 85$
-Watch Captain Artemis
-2 sets of Deathwatch Space Marines
-1 Venerable Dreadnought and Deathwatch Upgrade Sprue
-Comes with the Indomitus Kill team Formation sheet
Carcharodons: Red Tithe - 27$