I clicked on this and the first thing out of my mouth was "Holy Crud"! This is fantastic! The details on his armor are awe inspiring and I really like the glowing effects of his spikes, not to mention those frightening eyes. The background with his soldiers just waiting for his command is surreal. One of the best Shredder takes I've seen!
I look at this pic and I get a sense that this is an ancient warrior somehow thrown out of his own world into one alien to him, but despite impossible odds he endured, eventually conquering and enslaving whatever was there and then using it to create this army. Now he returns to his own world, armed with otherworldly power, ready to continue his conquest.