A new Korean character poster for Rachel McAdams has just appeared online (caught it over at Coming Soon via Cine 1) and shows her reprising her role of Irene Adler in Guy Ritchie’s upcoming sequel, Sherlock Holmes: A Game of Shadows.  McAdams is returning as Holmes (Robert Downey, Jr.) and Watson (Jude Law) face off against their greatest enemy: Moriarty (Jared Harris).  Noomi Rapace, Eddie Marsan, Stephen Fry and Gilles Lellouche round out the cast of the film, which opens on December 16th.