dont take anything you see from wiki true,members from bungie transferd to 343 and 343 was always up and runing helping the game server and such halo waypoint for example was out waaay befor reach and it was made by 343
As much as I hate Wikipedia for their moderators who don't allow just one sentence pasted from another website, the content on the articles are mostly true and there's always sources for some of the claims. Other claims have no sources but the one I linked did have sources and if you don't believe them, well you can check the Halo 1 manual. Bungie developed Halo. Microsoft own the rights just as they own 343.
Will we see an Xbox 360 version of DC? Probably. After all, Larian got The Dragon Knight Saga published on the 360 and that was after Ego Draconis.