From the announcement:
We proudly present our most ambitious collection ever! Nearly 1,200 Space Marine models representing the Ultramarines as deployed at the Battle of Orar's Sepulchre 888.M41. Marneus Calgar leads his entire chapter against the perfidious Eldar of the Iyanden and Alaitoc Craftworlds.
Every Warhammer 40,000 hobbyist dreams of owning a complete Chapter of Space Marines - this special collection is your chance to achieve that dream in one fell swoop.