And for those who care, here's the text that's in the little trailers, which themselves have some nice images of Reki and others:

私は見た、
I saw it.
地獄の炎を。
The flames of hell.
私は行く。
I am going.
この世界を、
Through this world...
そして壁の外へも。
and outside the wall, as well.
あなたはこの戦いを、
It's better...
知らない方がいい。
if you don't know about this battle.
その事実を知った時、
If you knew the truth...
あなたの常識は崩壊する。
everything you know know would fall apart.
光と闇のエージェント。
An agent of light and darkness.
Guristan十ine