Although there are tons of great ideas posted here, they are all the reason why every true Disney fan is ultimately disappointed with the final outcome. There is no originality, everything now has to be tied to some sort of film property. If you look at DL and MK in their semi-original forms, save for a few exemptions (Swiss Family Treehouse, 20,000 Leagues...) everything that was tied to a film was located in Fantasyland. With that everything stood on its own merit. Space Mountain, Jungle Cruise, Thunder Mountain, Pirates (even though they seem to have a terrible infestation of Depps, which I have come to peace with) still pull in the numbers after forty plus years. This is where my big complaint lies, as cool as it would be to have a Tron coaster (frickin' awesome) what I really want is what Walt did way back in 1951, give me what I didn't know I wanted but now I need. If you look at all the posts here about what everyone hates, namely Stitch (myself included) and then referencing Alien Encounter as something they love, what was it that drew you to AE? I know for myself, there was something special about it, it was so far away from everything Imagineering had done before, they had plussed themselves by going out of the box and replacing an extremely dated Mission to Mars with something simple yet original. So, I won't be adding to the attractions suggestions but I will put in my two cents on the whole theming of the area. As soon as New Tomorrowland opened, it had instantly dated itself, it will always do that, its the nature of the subject of the land. What MK needs to do is embrace that fact and pick a specific future. I would lean towards a mid century view of the future, just flipping through old Popular Mechanics magazines, you'll find a whole wealth of material for tons of great attractions that, if well maintained, would instill a sense of nostalgia that Disney built everything around at the same time the sense of hope and wonder of what the future could truly bring.