My proposal:
If money and time weren't an option....
Space Mountain closes for nearly two years or so after Tron opens. Space Mountain reopens in time for its 50th anniversary in January 2025 with a November 2024 soft opening to handle the seasonal crowds.
The exterior would be sand-blasted, repainted white, with a new lighting package. The arcade building's roof would be demolished and redesigned to mimic the adjoining space mountain entrance better with more of angular look.
The queue would be get lighting and sound system upgrades while maintaining the soundtracks we all love. The old RCA display windows in the zig zag queue would get a full refurbishment, including new narration spiels that no longer mention RCA, but instead reference "StarPort 75".
The two rollercoasters would be demolished and rebuilt brand new, in nearly identical layout, with silent lift hill, better banked turns and angled drops. Interestingly enough, the original Disneyland Space Mountain on board soundtrack works very well with Walt Disney World's version. I'd create brand new single row-4 seater toboggans with onboard audio, refreshed paint job, and bring back the glow-in-the-dark paint.
Favorites like the blue tunnel would bring back its original (beep beep beep beep)musical loop while keeping the addition of the energy ball that pulses to the beat, with a new fiberoptic wall of energy in the entrance to the lift hill tunnel that shimmers and shines as your onride photo is taken.
The lift hill would be restored with numerous broken effects brought back (i.e. signs that no longer blink), the fogged up windows in the control rooms on the lift hill, the spaceship and light panels that hardly work anymore, and the astronauts would become minor moving AA figures.
The red, re-entry tunnel would be a combination of the one in California and the original one still inside Walt Disney World's version: a new tunnel would be build as your vehicles enter a shooting and swirling field of fiber optics (think: Disneyland) before transitioning into WDW's original space mountain red tunnel.
The post show, with no speed ramp, would contain the instrumental version to RCA's old song "here's to the future and you" with new and better scenes showing the various planets and galaxies served by starport 75. As you enter the new exit corridor, the non branded version of RCA's "here's to the future with you" would play with new flat screen monitors and projections filling the two story room, showing people's on board photos and "photos" of them visiting those other places star port 75 serves. Hanging from the ceiling would be a full-size replica of Voyager 1 and its golden disk, with pictures showing all the planets it saw on its journey since it left Earth.