Love this A LOT. Sounds really good.
However, I don't like the change that the choir makes at 0:55. It needs a little more release, I think.

very ominous, sounds like a pretty solid intro track!

I think you could keep building up the track until the end, maybe so you have this wall of sound type thing which abruptly cuts off, add to the impact of the introduction

just my thoughts, hope it helps