I was watching the walt disney world: past, present, future on youtube tonight and found one point rather interesting. It was during the fifth segment (link located below) when john lithgow was standing on hollywood boulevard while it was being constructed. He mentioned how the tower of terror was being constructed and how "the toon town transit" was supposed to be constructed on the street as well. It also goes on to mention how splash mountain is under construction, a space pavilion is being planned for future world (this was broadcast in '91 and we wouldn't see mission space until 2003), a russia pavilion being built and the mount fuji roller coaster. Kind of interesting to see how he seemed so positive all the attractions were being built and only two panned out and one later. If anything it provides some cool old concept art for these attractions.
http://www.youtube.com/watch?v=Ls_egKAF3sc&feature=related
http://www.youtube.com/watch?v=Ls_egKAF3sc&feature=related