THE BLACK HOLE! Put this where Timekeeper was and make it a combination of the Armageddon disaster attraction overseas and a next-gen flight simulator ride.
You start in the Cyngus, the space vessel researching the black hole. The evil Maximillian robot is monitoring the space anomoly, when astroids being pulled into the hole smash the spaceship, causing gantries to fall, steam to hiss, sirens to go off, and the floor to rumble. Escape pod doors would open simultaneously and guests would enter the pods, piloted by VINcent and BOB. Upon launch, the robots discover that Maximillian has sabotaged the pods! What follows would be like Star Tours, only much more realistic and better video, as Vincent and BOB try to pilot you into - and beyond - the Black Hole!
At least this would fit in with Tomorrowland!