I have an idea of moving Buzz Lightyear Astro Blasters to the empty land next to Toy Story Land, so Buzz and Woody will be re-united and TSL will be more complete.
The move allows the original plot of land that Buzz sits on to potentially be united with the empty plot to the east (or below in the park map) of Autopia to create a big ride in Tomorrow Land. (Two purple plots of land, near bottom right in below map.)
The new attraction(s) can straddle the train track, a train tunnel be created or a bridge is built for guests, clearly it depends on what is planned. Maybe an area for Stark Expo or Star Wars?
The cost of this is just the relocation of Buzz's Astro Blasters. It is minimal.