You know this undead/zombie trend is getting really fucking old.
You might try something original for a change. I used to be fascinated by the undead thing but it's way to trendy now and it's in your face too much. I don't mean to pick you on but damn it, I think there are far better ideas to start exploring.
I'll agree with Askepios on the overcooking of the zombie trend. That aside, your design feels too nice/cartoony to represent a one-handed maniac who's been drug through hell and time. Definitely crumple that banner and add a healthy dose of badass shading.
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