Check out Fray on Wikipedia, and then order it off of Amazon, or find it at a store. It is simply, a great work. Sure, it's a spin off from Cult classic Buffy the Vampire Slayer, but it's still a good horror/fantasy/action, and it would translate very well to a animated medium.
Not only that but the Adult Swim time slot on Cartoon Network has almost nothing but comedy and anime. Fray would be a refreshing addition to the prerequisite anime and random comedies. It has a firm storyline with the Joss Whedon humor that made all his works great.

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