Mark Strong, who plays the villain in the upcoming Sherlock Holmes movie directed by Guy Ritchie, gave away the film ending during an interview with Total Film! Well, I don't think that what he revealed is that much of a spoiler, but be warned, if you start reading what's below:
There's a touch of Dracula about him (Lord Blackwood).
He needed to have an element of showmanship about him by virtue of the fact that he's trying to persuade everyone around him that he's so in league with the Devil that he's able to conquer death. I just wanted to make him an equal adversary of Sherlock Holmes."
(that's a real picture of Mark Strong as Lord Blackwood!)
The way he describes this final scene reminds of the classic scene with Moriarty and Sherlock Holmes fighting by the waterfalls.
I don't consider what Mark Strong as a spoiler at all: actually it's quite the opposite. It just makes me even more impatient to watch this new Sherlock Holmes movie!