The codex supplement Clan Raukaan is already up for pre-orders, and you can check out a free preview of the codex as well which I read through. From my read through, it very much looks like if you want to play an Iron Hands Dreadnought army, then this is your chance. That alone has me interested in this.
Here is a link to the new video up on Youtube.
and of course here is where you can download the preview for Clan Raukaan