The current PP insider shows an exploded view of the Cygnar Stormwall colossal. I had two thoughts on seeing it:
First, it's darned kewl. Lots of nifty little bits, and 3 separate little markers, which I think are for one of its special abilities or an attack. It also does not look to be any more complicated to assemble than a thunderhead.
Second - 'jacks leave wrecks, warbeasts wander off. Fair enough. Battle engines do not leave wreck markers. (Huh?) Colossals apparently do - there is mention of a 120mm card wreck marker.
ETA - it's up on the gallery page as well.