Sherlock Holmes: A Game of Shadows is an upcoming 2011 action mystery film directed by Guy Ritchie and produced by Joel Silver, Lionel Wigram, Susan Downey and Dan Lin. It is a sequel to the 2009 film Sherlock Holmes based on the character of the same name created by Sir Arthur Conan Doyle. The screenplay is by Kieran Mulroney and Michele Mulroney. Robert Downey, Jr. and Jude Law reprise their roles as Sherlock Holmes and Dr. John Watson, respectively, as the duo join forces to outwit and bring down their most cunning adversary, Professor Moriarty.
Sherlock Holmes (Robert Downey, Jr.) and his longtime trusted associate, Doctor Watson (Jude Law), take on their arch-nemesis, Professor Moriarty (Jared Harris), with the help of Holmes's older brother Mycroft Holmes (Stephen Fry) and a gypsy named Sim (Noomi Rapace).
After the success of the first Sherlock Holmes, a sequel was fast tracked by Warner Bros. with director Guy Ritchie dropping out of an adaptation of Lobo and Robert Downey, Jr. leaving Cowboys & Aliens. It was unclear if Rachel McAdams would appear in the film. McAdams said, "If I do, it won't be a very big thing. It's not a lead part". On February 4, 2011, Warner Bros. confirmed to Entertainment Weekly that McAdams will play a part in the sequel.
The film is reported to be influenced by Conan Doyle's The Final Problem. While the film takes place a year after the events of the first film, Sherlock Holmes: A Game of Shadows is intended to be a stand-alone film that doesn't require knowledge of the previous film.
In October 2010, Robert Downey, Jr. and Jude Law were seen rehearsing a fight scene as shooting took place in Richmond Park, south-west London. A large green screen was erected at Didcot Railway Centre in October 2010 and a large action scene was filmed there in Mid-November. In late November, a scene was filmed at Victoria Bridge, which is part of the Severn Valley Railway. In January 2011 scenes were also filmed at Hampton Court Palace.
Early February 2011, principal photography moved for 2 days to Strasbourg, France. Shooting took place on, around and inside the Strasbourg Cathedral. The scene is said to be the opening scene of the movie, as it will cover an assassination/bombing in a German speaking town.
The film is scheduled to be released December 16, 2011 in the United States and United Kingdom and December 25, 2011 in other countries.