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Warner Bros. is in talks to set the screenwriting team of Kieran and Michele Mulroney to pen a sequel to "Sherlock Holmes."

Studio's aiming to launch a franchise with "Sherlock," set to open on Christmas.

Robert Downey Jr., Jude Law and Rachel McAdams star in the pic directed by Guy Ritchie; Lionel Wigram, Susan Downey, Dan Lin and Joel Silver produced.

The basis for the film is both the Arthur Conan Doyle classic stories and the comicbook "Sherlock Holmes." Michael Robert Johnson, Anthony Peckham, Simon Kinberg and Wigram worked on the screenplay.

The Mulroneys penned "Justice League" for Warner Bros. along with writing and directing indie drama-comedy "Paper Man," starring Ryan Reynolds and Jeff Daniels.