FilePlanet: Offers movies and a trailer.
GameFAQs: Release data and a message board.
GameSpot: News, previews, images, videos, links, and a forum.
GameSpy: Mortal Kombat: Provides release data, screenshots, and a preview.
IGN: Mortal Kombat: Screenshots, videos, features, and news.
Team Xbox: Provides news, screenshots, and movies.