About the song: Tried to make the intro something that gives a hook into the song, I think that from a first listen it may be like "who, what?" lol, idk, I cant judge it because i heard it so many times I got used to it so you may be right; I do can tell you it was the biggest challenge for me on the whole song! You have no idea how many days i spent just on thinking of 5 silly seconds for the intro :p. But its good to know what you said, you know, for next time; so thanks ;)
I think the hook is perfect. DO NOT touch the hook, it's creative and it caught my attention instantly. Work on the climax/conclusion of the song which happens right before the loop point. That's the part which was very weak considering how much tension you were building up.
Ok, I see what he's talking about now. The introduction isn't the real hook, it's more of a fill. The real hook stars after that. What you can do to make it more attractive is to add orchestra hits. That will add more emphasis to the intro rhythm.
This song is so epic that I think it's too good for just one boss, it needs to be for that dramatic initial final stage.