... while spinning in his urn, most likely. Robert Downey Jr once again proves himself to be the best actor of his generation and without him this movie would limp along, and its inconsequential paper-thin plot would be much more grating. Perhaps the biggest crime in the film is that Holmes - as a 2-dimensional vehicle for awesomely-intriguing detective tricks - is given a really lousy case that relies on some massive leaps of logic and an almost physic predictive ability.

I still enjoyed the movie, mainly because of RD Jr, but there were some real weaknesses, such as...

1. Rachel McAdams, who has zero charisma for the role. Bad casting.
2. The overbearing music, which I must have noticed a half dozen times.
3. The drab direction - great sets, CGI and costumes covered with lackluster camera moves.
4. Terrible geography - yeah, I grew up in London so I'm biased, but running up the stars of the House of Commons doesn't lead to the Tower of London.
5. Coincidence: overall, the way in which the black magic is explained is pretty weak - I was hoping for a little more realism that the voodoo-meets-technobabble that the audience is given. The guy who bursts into flames - due to an odorless flammable liquid sprayed into the courtyard like rain - well, wow, that was a huge example of lazy writing. 
6. Varying Holmes' fighting capabilities - in one scene, he practically kills a guy in two seconds; in others he struggles for no reason other than to drag out the sequence.
7. A brutally predictable plot.
8. A confused bad-guy agenda that could have been lifted from Pinky and the Brain (step 1: take over the world).
9. An unbelievable femme fatale subplot.
10. Postponing an answer to a major story question until the sequel.

Given a character so ripe for a complex crime caper, they took the easy route and spoon fed the audience with a routine we've seen a thousand times before. But the Fighting Holmes works relatively well, his deductive approach is fun to watch, and the art department did a great job in creating Doyle's London. Mindless and fun entertainment - but die-hard Sherlock fans are not going to be happy.