Caladbolg, I don't know if you're planning that as a support pic -- but your final submission needs to be on a plain white background -- as stated in the submission rules in the OP.
Caladbolg's pretty much got my vote. Just thinking, maybe a royal purple cape would work as well?
EDIT: Just missed DarthVader's submission. Maybe it's just me, but it seems kind of strange to see a horse without a rider... good job though!