I like it, and I like where your going with the back.
The front looks a little cluttered, and a it's a total guy fest with the exception of Mai.
Perhaps use some art other than their portraits if you can find it...
Also if you can work it in, I think the KOF logo on the front would look better Centered, or atleast off to one corner or another, as is is good... but something seems off... Balance wise... IE theres all kinds of action to the right but not as much on the left. ( I Mean the front portion only, I understand the back side is still in progress)