The full cover has been leaked now for the new White Dwarf alongside some pics of the sprues to a new Dwarf Lord kit.
Here is the link to check out the three pics.
http://astropate.blogspot.com/2014/01/belegar-martello-di-ferro-e-un-vecchio.html
via Nicholas Sacco on L' Astropate
It was supposed to be a plastic Dwarf Lord kit that was never released when intended (back around plastic Miners if I remember correctly was when this was commissioned)