Overview

• At an August 21 media reveal, Disney introduced a new Rainbow Caverns show scene with phosphorescent pools and iridescent stalagmites and stalactites that shift to a more menacing tone with a deep rumble.
• The update re-centers the attraction’s narrative on mining magnate Barnabas T. Bullion and the mountain’s forces pushing back against his quest for gold.
• Disney describes a “mountain-top to cavern-deep” refurbishment preserving the ride’s core thrills while refreshing effects, scenery, and vehicles.
• The company reaffirmed a 2026 reopening window for Magic Kingdom’s Big Thunder Mountain Railroad, with no specific date announced.
• Walt Disney World’s official ride description now references the Rainbow Caverns, while rumored contractor details and possible finale changes remain unconfirmed.