Yepyep, that's where I got it! I listened to it and was all like "yeh this sounds pretty good actually" and then I got a hallowed vision flashing right before my eyes. So after I wiped the froth from my mouth I started working on the intro with this inspiration.
The Emperor finds out he has had a cactus lodged in his groin region since he was interned into the golden throne, it was left there by Rogal Dorn to start the great plan.
I've tinkered further with the intro with some new stuff added, some stuff remastered and what-not all according to the critique I got from people! I'm just going to link this version of the intro here though because you people are totally super special! There are also some glorious easter eggs. See if you can find them!
Not sure if it's an easter egg, or if it's actually what I think it is, but if those are the four chaos gods in the warp right as The Emprah's soul is forming, that was a nice touch.