These look great from the preview image above. Can't wait to see full pictures of it coming soon.
From the Forgeworld Bulletin this morning
The Forge World Studio have not been shy about releasing deadly robots and mechanical constructs onto the battlefields of The Horus Heresy, from waist high servo-automata to colossal Titans. I just caught sight of the latest addition to their ranks, this one programmed to defend the Lord of Iron himself!
I hear that you might even be able to get hold of this brutal machine at Warhammer Fest in May. Grab your tickets for this awesome event whilst you can!