2010 for Disneyland makes the most sense to me since it's Disneyland's 55th. and it should be a major event.
Indiana Jones Adventure was the centerpiece of Disneyland's 40th. anniversary celebration in 1995 and since that was extremly sucessful for them i'm sure they want to capture lightning in a bottle twice and launch the 55th. with another new Lucas blockbuster e-ticket :sohappy:.
Oh and I think Disney's MGM Studios started going south after Bob Weiss left. It was shortly after Twilight Zone:Tower of Terror opened that everything fell apart. I personally feal its a mistake to bring the music industry and too many "hip" elements into the parks. Aerosmith and American Idol don't belong in the park as far as im concerned. Disney's own properties, Jim Henson Studios, Lucasfilm, and Pixar all represent timeless entertainment and not something that is hip and trendy. They should have focused on developing attractions around those studios and maintained the "1930s golden age of hollywood" around the park.