Oh my God! You don't expect much from sequels except probably the same storyline. Although the movie is pretty much in synch with the first movie, the things that these guys go through now are more outrageous than it was the first time. I can't say much more without giving stuff away and I promise you, you don't want to miss the crazy ride on this train. One thing I will say though, Stu with pulling his tooth in the first movie, dude, you have to see what he went through now to believe it. A+++ on this movie.
I've read the late Sir Arthur Conan Doyle novels and have watched the old Sherlock movies that pretty much followed the late author's work. This is a version in and of itself. Ritchie's version of the Holmes character makes the detective a brilliant but flawed individual. Makes Holmes more human than a superstar. If anybody could pull of the character's flaws, Downey would be the man. Downey's portrayal of Holmes was terrific. I sometimes forget this is the same individual who played bit parts like in Dangerfield's "Back to School".