Update: Sadly the video itself is now private and doesn't seem to be available anywhere else. If it pops back up you'll be the first to know.
Star Trek II: The Wrath of Khan hit cinemas way back in 1982, and the film's tense space battles were realised by Industrial Light and Magic using models and old-school film effect techniques. So it was only fitting that ILM was called upon again to bring J.J. Abrams' take on the clash between James T. Kirk and Khan Noonien Singh to life—but this time using modern computer graphics and digital compositing techniques.
You probably weren't surprised that Sherlock turned out to be Khan, but you'll certainly be impressed how much action originally took place in front of a boring green screen.