Superb.
This song is pure AWESOME. This piece is by far the best one you've made (even better than Batman's Pain, or the Sneaking song) It is absolutely amazing.
It starts slowly and keeps the nice pace by not ending too fast or going on and on too slow, it has nice little spikes of strings and gradually introduces the horn instrument. After which the epic chant choir comes into works and the song turns more aggressive just sends shivers down my spine. Already by then I got sucked in into the "plot" of two massive powers measuring the strengths in apocalyptic battle. The very low "male" war chanting is also a very good choice and it is even more better than Hans Zimmer's work on Last Samurai. Keep this kind of stuff mate, the epic, sad yet powerful piece of highly polished, quality music. This is where you're strength lies at and it does not disappoint.
Keep it coming mate.