Formatwarcentral writes: Over at Eye Crave DVD we read something interesting about the upcoming releases of I am Legend.
Shane says that according to the notes he received, the HD DVD will not contain all of the same extra features as the Blu-ray disc.
Both discs should have the alternate version of the film and the Animated Comic. The Blu-ray Disc is said to also have a 'Creating I Am Legend' Documentary and Cautionary Tale: The Science of I Am Legend, where Will Smith, director Francis Lawrence, producer-screenwriter Akiva Goldsman and novelist Richard Matheson examine the real-life science behind the film.
Keep in mind that there is no hard evidence that the HD DVD will not include these extra features also, but it is certainly conceptually possible that either due to capacity limitations or due to Warner having chosen their side, that they would have content exclusive to the Blu-ray release compared to the HD DVD. It will be interesting to see as more details become officially available.