These contents seem to line up with the last set of rumors we heard back in FEB.
via Steve the Warboss 2-25-2015
-Gaming Set Includes a Supplement for the Age of Darkness
-Rules and a Dettachment for Playing Legio Astartes and Xenos in the Past of 40k
–A new Allied Matrix including Xenos of the 31st Millenium
-Very generic Dataslates for the Models, only the featured Characters will have specific Background, but can used for any Legion
-Unlike the previous Sets, the Squads will have no unique Leaders, only names “Sergeant”
-Box will include 6 versions of new Sprues
About Rob Baer: Founder, Publisher, & Managing Editor of Spikey Bits, the leading tabletop gaming news website focused on the hobby side of wargaming and miniatures.
Rob also co-founded and currently hosts the Long War Podcast, which has over 350 episodes and focuses on tabletop miniatures gaming, specializing in Warhammer 40k. and spent six years writing for Bell of LostSouls.
With over 30 years of experience in retail and distribution, Rob knows all the products and exactly which ones are the best. As a member of GAMA (Game Manufacturers Association), he advocates for gaming stores and manufacturers in these difficult times, always looking for the next big thing to feature for the miniatures hobby, helping everyone to provide the value consumers want.
While he’s played every edition of Warhammer 40k and Warhammer Fantasy (since 5th Edition) and has been hobbying on miniatures since the 1980s, Titans of all sizes will always be his favorite! It’s even rumored that his hobby vault rivals the Solemnance Galleries, containing rulebooks filled with lore from editions long past, ancient packs of black-bordered Magic Cards, and models made of both pewter and resin.