Well, since this isn't "Grey Knights" and it isnt' "Sisters of Battle" this might actually be a brand new, stand alone codex.
I have none of the programs that would allow me to preview it, but it looks brand spanking new. Of the "page shots" available on the left hand side, the "Ordos Chronos" isn't something I've seen before.
It also bodes ill for the members of my little RPG...