"Worlds will collide. The fate of the universe will be decided." And the Internet will explode with indignant fanboy rage. Yes, Mortal Kombat is back, and this time it's teen-rated, which means no spine-ripping fatalities. Blunting the brand's trademark happy endings is inevitably going to unseat a few spleens, but that's the price series creator Ed Boon is prepared to pay for shacking up his "billion dollar fighting franchise" with Warner Bros. to bring the two famous brands together in one star-studded beat-'em-up package.