Hi Tera,
You're remixing Terra's theme and your name is also Tera, that's awesome! Anyway, onto the remix. I'm liking what I hear so far, you've made me curious to see where you go with this!
Just some productions comments. The choir (or are they strings?) in the intro sounds a little too fake for the mood. The delay effect you put on the piano is a bit much for my tastes, it sounds unnatural. I think the percussion is nice and epic though, well done on that. Also, when it's just the piano and percussion playing, the remix is sounding sparse. I'd recommend adding more layers, or have that section lead into another more intense section. That leads me to the arrangement.
I'm enjoying you're rendition of this mega-popular source. I'd say so far you've taken a unique approach, so that's good. My only other thought would be that the ending is building up to something, but never quite makes it. Perhaps you already have a plan, but I would love to see you expand the current ending into a more intense section. I'm hearing in my head what it could sound like, especially the percussion, and I'm excited. This has potential. I'm looking forward to what you come up with!
I checked out some of your other music (which is great by the way, especially your singing!) and I see that you play violin and sing. Maybe you could incorporate some violin or vocals into this remix. I'll be following you're progress on this, looking forward to more!