The Warner Bros. sequel, Sherlock Holmes: A Game of Shadows doesn't hit theaters for almost two more months, but The Hollywood Reporter brings word that work has already started on a third adventure. Warner Bros. has hired Drew Pearce to tackle the script.
Pearce, best known for his writing and producing work on the British superhero comedy series "No Heroics," is also providing the script for Iron Man 3, to be directed by Shane Black and also starring Downey. His being brought aboard Holmes likely speaks very well of the actor's thoughts on the current draft of that Marvel Universe project.
No other talent is currently attached to a third Sherlock Holmes, though it is an almost certainty that Downey and Jude Law will return as Holmes and Dr. Watson.