I figure I may as well post my wip:

A lot of issues with it so far: the skin isn't "smooth" enough, in the DC sprites there isn't much hard segmenting between muscles, just subtle highlights to signal form. The colors need a lot of tweaking, too. I didn't pick a palette directly from the game because I figured that would take some of the challenge out of it (and
someone had to pick them in the first place, right?). Though it probably would be useful if we were able to rip the palettes easily so we could play around with them. I made Arthur taller than Firebrand because he's standing up straighter, and I wanted him to be a little intimidating, though now I'm wondering if I should shorten him up a little.
Adarias, that's very nice. That gray shade you have there seems too light though, and makes him feel washed out. There's not a lot of the high contrast feel in the sprite because of it. His left leg seems a little wonky, and it's hard to tell what's going on with his left arm. I will critique more once you finish him.