I've read the script and I must say it will either turn out to be "Raiders of the Lost Ark" or "Wild Wild West" depending on how Guy Ritchie handled it.
Holmes is more bond like in this, doing round house kicks, slow motions fight sequences, and bedding women.
Great cast however, but its wait and see if this version works and launches a subsequent adventure franchise.
There's a really cool script at Paramount right now that supposes Harry Houdini was an American spy in world war I, its really clever, he's a ready made spy as he can pick any lock ,escape any prison, survive drowning and being buried alive, knows how to fly a plane, the story is very involved as well as he's sent to steal blue prints from the Kaiser, save the Romanovs from the Bolsheviks and perhaps participate in a plot to assassinate Lenin.
Very clever script.