For some reason, I was thinking that they could've used Prelude (the first song you're greeted with when booting up the game) as the intro. I think it would be a good intro song.
Oh well, since you mentioned it, now I'm really disappointed it's not in it.
In fact, just browsing through YouTube, I found not one, but 3 versions that could totally work way better.
Actually, I'm showcasing 3 here, but every version that I found feels better that this, and these are fan made, I can only imagine what a professional studio recording would sound like.
They could use violins and organs for it, to give it a more eerie atmosphere.
Prelude not only is a memorable tune from the game, but it also has a recognizable melody.
And it sounds properly epic, instead of generic 'epic', it would serve as a build up for episodes, perfectly.
https://www.youtube.com/watch?v=O63axZfNXvchttps://www.youtube.com/watch?v=qsxtn5uv0bohttps://www.youtube.com/watch?v=jqwWJizJHKwWhile this
is indeed a chance they missed, I hope that's not the case for the entire soundtrack, I really am hoping for arranges of the game music in this animation.
It's not even asking much to be honest.