We are looking at this weeks White Dwarf images, as they are floating around the internet as we speak. There is some detailed background about the new codex release as well as a good look at the weaponry on the new Helbrute.
I think the new Helbrute is really shaping up model wise. It definitely makes me wonder how long this one has been done, but its definitely a model worth waiting for. It comes with a lot of customization bits, like 6 heads. Check them out by following the link.
http://theflyingpredator.blogspot.com/2014/03/helbrutes-incoming.html