I found some really good resources out there on the web and found some brilliant reference imagery.
Just to dip my toe in the water i started out using some concept art that was created for Mirrors Edge 2 on the PS3.

Then armed with the rest of my imagery i set about destroying the radiant views of futuristic Tokyo and this is where i arrived.
I only spent a short while on it as i wanted it to be as sketchy and loose as possible. The idea was to create an evil overlords HQ in the middle of the destroyed city with a lone soldier keeping watch over the raised entrance.

Comments as always are welcome,
Andy