The sun really glows in the background there, the winds rain, the dust floats, the light withers, the darkness spreads, the storm rages, the conviction glows... I love the energy in this! If there's anything to improve I feel like the sound design could be 'larger' somehow. The voice is grizzly, but also narrow. The background soundtrack doesn't seem to grow along with the animation. I feel like a bit more powerful sound design could take this even further.
Either way really looking forward to seeing the full thing. Awesome preview.