The series produced two financially successful movies about a decade ago; the first in 2009 and the sequel, Sherlock Holmes: A Game of Shadows, in 2011.
The two shows are intended for HBO Max, which appears increasingly invested in television spinoffs from big-screen Warner Bros. franchises.
There has also been talk about television series based on or continuing the events of Dune and the It franchise.
The Sherlock Holmes franchise, starring Robert Downey Jr. as the iconic private detective and Jude Law as his sidekick Dr. Watson, has been stalled out for several years.