WIP Spiderman 'Rhino' sculpt

Here are some work in progress grabs of a little project I've been doing in recent lunch breaks.
With 'Rhino' being announced as one of the villains for the Amazing Spiderman 2, I thought I'd sketch sculpt my own version in Zbrush using Dynamesh (This started out as a simple sphere). I've given him a power armour 'Ultimate' look over the traditional bio suit. Lots to do, but I'm enjoying playing with the big primary shapes at the moment before retopology and details.