I've been redesigning some Bat characters, started them off more tactical but slowly it is just changing into a redesign frenzy.
I did the design on the RIGHT first, just because I wanted to go for more of a horror feel. Symbolize fear and death and have some accents of a scarecrow. Where as the one on the left is a bit more classic and not much of a change from previous interpretations.
Edit: Changes made from original image: skinnier legs, more hay visible (popping out of material), more nails in shoulder area/scythe-axe