That’s right. A demo of Metal Gear Rising will be included with Kojima’s upcoming Zone of Enders HD Remake. Besides that, not much details about the demo being included have been mentioned. No mention of if the demo will be available on the same disc as Zone of Enders HD or included as a download code for owners to redeem. For those who have no plans of buying Zone of Enders HD, not to worry, the demo will be released online via PlayStation Network and XBox Live some time after the Zone of Enders owners get their hands on the demo.
Source: Konami Pre-E3 Show