I had the opportunity to play Disneyland Kinect Adventures a while ago and I gotta say ... I was thoroughly impressed. Gameplay aside, the environment itself blew me away. There was plenty of detail, from the bunting on Main Street to the style of rails and paths. It was really cool and now I plan on getting an Xbox just for this game.
Anyway, I'm sure the game itself has been discussed here, but I had an idea.
Expansion packs for different time periods. How awesome would it be to download Disneyland 1955 and see what it looked like on opening day. Disneyland 1960s, where you could revisit some beloved attractions of the past, take a ride through on Adventures Through Inner Space. They could even do 1990s, where you could see 1998 Tomorrowland, functioning as it was meant to.
If this was a reality, what kind of stuff would you like to see "brought back" through this game?