When Big Thunder Mountain Railroad officially welcomed guests back to Magic Kingdom earlier this year following an extensive 16-month refurbishment, Disney fans were eager to experience the refreshed track and set pieces on the “wildest ride in the wilderness.” However, observant coaster enthusiasts quickly noticed that one beloved, quirky detail was noticeably missing from the town of Tumbleweed: the famous spinning possums that dangled over the tracks.Credit: Jeremy Thompson, FlickrAt the time of reopening, Walt Disney Imagineering reassured parkgoers that the missing critters were still part of the attraction’s long-term design and would eventually return. Now, just months after the ride reopened, a newly filed construction permit provides the strongest indication yet that Imagineering is moving forward with additional set work that could help bring the missing possums back to Frontierland safely.A newly filed construction permit indicates that Disney is actively preparing to make a set modification to Big Thunder Mountain Railroad, potentially paving the way for the missing possums to return to Frontierland safely.The Curious Case of the Missing Tumbleweed PossumsFor decades, one of the most charming visual gags on Big Thunder Mountain Railroad occurred during the Tumbleweed portion of the coaster layout as runaway mine trains splash through the flooded mining town. As trains speed beneath a large weathered tree on the edge of town, riders used to look up to see a family of animatronic possums spinning by their tails from a low-hanging branch directly above the ride path.Credit: DisneyHowever, when the attraction completed its massive track-replacement project and reopened in May 2026, the branch and its spinning inhabitants were nowhere to be found. In their place, the tree trunk appeared completely smooth, finished over with fresh bark texturing as if the branch had never existed.To casual theme park visitors, a couple of missing fake animals might seem like a minor oversight. But to dedicated Walt Disney World fans, the disappearance of the Tumbleweed possums was an immediate topic of discussion across online forums and social media.Failed Clearance Tests: Why the Possums DisappearedShortly after the ride reopened without the critters, details emerged explaining why the branch had been removed.Credit: DisneySafety is the absolute top priority for Walt Disney Imagineering when designing and maintaining high-speed thrill attractions. Every roller coaster at Disney World undergoes rigorous ride-envelope testing—a process designed to ensure that guests and ride vehicles maintain the required clearance from overhead and roadside scenic elements.During pre-reopening testing on the newly replaced track, engineers discovered that the low-hanging possum branch breached the coaster’s safety envelope zone. Because the branch and the possums were found to be too close to the ride path, failing to meet the required clearance standards, Disney had to remove the branch to ensure rider safety.Credit: DisneyBecause Disney did not have enough time to correct the issue before the scheduled reopening, Imagineering temporarily removed the branch, finished the trunk, and operated the ride without the spinning animals while work toward a permanent solution continued behind the scenes.The Imagineering Permit: What the Paper Trail RevealsThe first major physical sign that a fix could be underway appeared in early October 2026, when riders zooming through Tumbleweed spotted a large, dark tarp wrapped around the exact spot on the tree trunk where the possum branch had previously attached. The tarp appeared to indicate that work may be underway on the tree during periods when the attraction is not operating.Credit: Renato Mitra, UnsplashConfirmation of additional work arrived on October 8, 2026, when Walt Disney Imagineering officially filed a new Notice of Commencement with Orange County public records.The permit specifically names Icarus Exhibits, Inc. as the contractor assigned to “Install set elements” at the site address for Big Thunder Mountain Railroad.Icarus Exhibits, Inc. is a longtime specialty contractor that has worked alongside Walt Disney Imagineering on projects across Walt Disney World. The contractor has previously fabricated and installed numerous scenic props and set elements across the resort, including previous work on Big Thunder Mountain Railroad.Credit: DisneyThe filing of this specific Imagineering permit provides the strongest indication yet that Disney is moving forward with additional set work at Big Thunder Mountain—and potentially the work needed to restore the missing possum scene.Engineering a Safe Return to FrontierlandIf the work is related to the possums, Imagineers and contractors at Icarus Exhibits could be modifying the branch, its attachment point, or another part of the scene to restore the visual effect while maintaining the required clearance.Credit: Theme Park Tourist, FlickrBy altering the height, curvature, attachment point, or another aspect of the scene relative to the newly installed track, engineers could restore the visual effect while keeping the animatronics safely outside the coaster train’s reach envelope. The tarp currently visible around the tree trunk appears to conceal work at the former branch attachment point.Any work near the active ride track would have to be coordinated around attraction operations and Disney’s safety procedures.Why Imagineering’s Attention to Detail MattersThe effort required to re-engineer a single scenic branch highlights Walt Disney Imagineering’s dedication to preserving the rich storytelling details that make classic Disney dark rides and roller coasters so memorable.Credit: Flickr/Joe PennistonBig Thunder Mountain Railroad first opened at Magic Kingdom in November 1980, blending family-friendly roller coaster thrills with rich narrative atmosphere. Over the past four decades, small character moments—like the chewing goat on the lift hill, the panicked townspeople of Tumbleweed, and the spinning possums—have become beloved traditions for generations of returning parkgoers.Rather than permanently leaving out a scene element that failed a clearance test, Disney appears to be moving forward with additional work that could allow the beloved possum scene to return.While Disney Parks have not announced an official return date for the spinning critters, the combination of the active onsite tarp and the newly recorded Imagineering permit provides the strongest signs yet that the possums could eventually be spinning over the tracks of Big Thunder Mountain Railroad once again.The post Confirmed: Disney Making Big Thunder Mountain Railroad Change Just Months After Reopening appeared first on Inside the Magic.