The thought just came up to my head. I mean, it's perfectly logical. We have next to no information about the game other than that it's in development. It could be perfectly made to come out as a release title for 720, giving people a reason to get the console as soon as it comes out. And if it had it's own Halo 2 MP with most of the maps, it would sell like crazy. Also if it were to come out on 720, I highly doubt it would be like Halo 4's MP, being a simple port. And if you thought Halo CE was gorgeous in HD, imagine Halo 2 (delta halo, high charity, earth) in next gen graphics. Interesting idea, indeed. Maybe this is one of the aces Microsoft has been holding back?