From the announcement:
This weekend there are even more highly detailed Citadel Finecast miniatures available for you to Advance Order - in fact, we've almost 50 new additions to our range of premium quality resin.
Necrons receive two new special characters, Orikan the Diviner and Anrakyr the Traveller. The Tau Empire receives plenty of reinforcements, everything from Aun'Va, Master of the Undying Spirit to Pathfinders. Orks, never ones to miss out on the fun, now have even more models, from Mad Dok Grotsnik to Ork Kommandos. There are also Grey Knights, Inquisitors, Assassins, as well as the Dark Eldar Beastmaster and his ferocious entourage...
As you can see, there's a lot now available to advance order, so make sure you head over to games-workshop.com to check out the full range.