Okay, so my feedback... the first two minutes sound good and are definitely your style, but I hesitate to say they necessarily fit as a hero's theme specifically. Later on, there's a handful of REALLY short instances that I think were a bit too empty (and again, like I said, not long at all; only one beat long or so... such gaps aren't inherently bad, of course, but I don't know that they were appropriate at the particular moment). I also noticed something odd in the panning of what sounded like an electric guitar, but that could just be my headphones acting up.
Otherwise though, pretty good! I almost see this as approaching a vein of "what if Xtrullor made electro instead of dubstep" in some aspects.