Oliver Queen is about to face his toughest adversary yet, and The CW has revealed a few new Arrow pics showing off the mysterious new Big Bad. Hmm ... that costume looks pretty similar, doesn't it? It's Christmas-time in Starling City. Oliver's gift? An archnemesis. The new pics show what appears to be a " Dark Archer ," though we're still not sure if it's actually the Dark Archer featured in the Green Arrow comics as a classic baddie for Ollie. Regardless, it looks like some ass-kicking will definitely be going down. We can glean a bit more from the official episode description for the midseason finale "Year's End," which airs Dec. 12: Oliver ( Stephen Amell ) discovers that after he and his father went missing, Moira ( Susanna Thompson ) and Thea ( Willa Holland ) stopped celebrating Christmas. Determined to make up for lost time and restore a sense of normalcy to the Queen household, Oliver decides to throw the family a Chr