Not half bad. Though it's tough initially. to imagine Ron becoming this sinister Red Hood, you add credence to this idea in the flashback by showing that you are capable of writing Ron as his typical goofy self. The reference to Rotten Tomatoes suits the KP theme well.
One mistake: "She noted the flippant attitude of her enemy as he slammed his fist into the side of her head, Kim managed to duck and avoid the blow as her enemy raised up a kris to slash her..." If you describe Hood as slamming his fist into KP's head, then she couldn't have possibly ducked the blow; the second phrase contradicts the first.
Keep writing.