Games Workshop has opened up pre-orders for their Militarum Tempestus codex, squad and vehicle over in their webshop.
From the website:
For the first time, the Scions of the Schola Progenium grace the pages of their very own Codex – exclusively available here!
The Ordo Tempestus commands the finest human soldiers in the galaxy. It’s disciplined ranks boast not only the elite Scions of the Militarum Tempestus but also brutal Commissars.