I'm not alert enough for a full review at this time, but I want to point out one thing that I noticed before I totally crash:
Christ almighty, those drumrolls scared me, they're so loud! My biggest problem with them, though, is that even if they were turned down, nothing is happening with the rest of the song to warrant their inclusion. Usually, I would use a drumroll as a transition to an expanded, likely more energetic section of the song, but for the most part it feels like they're thrown in somewhat-arbitrarily here.
I do like the first half of the song pretty well with the sparse but powerful drumbeats. That worked out well
Looking forward to seeing this improved, you picked some nice source tunes and I think you could go places with this!