If there is one absolute truth about the Walt Disney World Resort, it is that the parks are in a constant state of evolution. From brand-new themed lands to subtle adjustments on beloved classic attractions, Walt Disney Imagineering is always tweaking the magic. Now, it looks like Disney World is making another noticeable change to Big Thunder Mountain Railroad at Magic Kingdom, and it comes just months after the iconic coaster reopened from a 16-month refurbishment.Credit: Jeremy Thompson, FlickrEagle-eyed Disney fans riding “The Wildest Ride in the Wilderness” this week have spotted a brand-new development in the flooded town of Tumbleweed. It appears that a beloved detail—one that has been absent since the ride’s grand reopening—might finally be moving closer to a comeback.Here is everything we know about the latest construction happening at Big Thunder Mountain Railroad, why the beloved Tumbleweed possums went missing in the first place, and what this new change could mean for your next Magic Kingdom vacation.The Wildest Ride in the Wilderness Gets a RefreshTo understand this latest update, we have to rewind to earlier this year. As many Magic Kingdom regulars know, Big Thunder Mountain Railroad underwent a massive, 16-month refurbishment that stretched from early 2025 into the spring of 2026. For over a year, Frontierland felt a little too quiet without the familiar clack-clack-clack of the runaway mine trains and the echoing whistles across the Rivers of America.Credit: DisneyWhen the attraction finally reopened its queues in May 2026, the results were striking. The extended downtime allowed Disney crews to replace the attraction’s track and make extensive updates while maintaining the wild, out-of-control feel the coaster is famous for. Beyond the track work, the scenery received a much-needed facelift. The red rock formations were refreshed, the geysers were restored, and the flooded mining town of Tumbleweed received updated scenery and paint as part of the broader refurbishment.Overall, the massive overhaul was widely discussed and generally received positive attention from the Disney World fan community. But it didn’t take long for nostalgic riders to notice that something was missing.The Mystery of the Missing PossumsAs the runaway mine train careens out of the cavern and splashes through the flooded remnants of Tumbleweed, riders are usually greeted by a flurry of visual gags. From the sinking saloon to the spinning townspeople trying to stay dry, the scene is packed with classic Disney humor. But one distinct detail was absent on reopening day: the spinning possums.Credit: Renato Mitra, UnsplashBefore the 16-month closure, riders passing through this section of the attraction would zoom underneath a thick tree branch where a family of possums hung upside down by their tails, seemingly spinning in circles above the runaway trains. It was a brief, silly moment that perfectly encapsulated the wacky charm of Big Thunder Mountain Railroad.When the ride reopened in May, the branch—and the possums—were completely gone. Where the branch once connected to the main tree trunk, there was nothing but bare, painted bark.At the time, Disney quickly stepped in to reassure fans. Disney confirmed that the possums were still part of the long-term plans for Big Thunder Mountain Railroad and that they would return “soon.” Now, five months later, it appears that work may be underway that could eventually bring them back.Failing the Clearance Test: Safety First at Disney WorldWhy did the possums go missing in the first place, especially if they were meant to be part of the refurbished ride? According to Disney’s reported explanation, the possums did not pass a crucial ride-envelope clearance test before the ride reopened.Credit: DisneySafety is the ultimate priority at Walt Disney World. Attractions are designed with an “envelope of protection.” This is a specific clearance zone around the ride vehicles that helps ensure guests cannot reach out to scenery or other structures while the ride is in motion.During the extensive track replacement, changes to the ride system could affect clearances within the attraction. When engineers ran the envelope testing, the possum branch was reportedly deemed too close to the ride path. Disney did not have time to correct the issue before the scheduled reopening, so the branch and possums were temporarily left out while the attraction reopened.New Clues Point to a Possum RevivalSo, what is happening right now? Fast forward to October 2026, and there appears to be a new development at the Tumbleweed tree. According to BlogMickey, riders splashing through Tumbleweed this week have noticed a distinct new addition to the scenery: a large, dark tarp.Credit: Jeremy Thompson, FlickrThe tarp is currently covering the exact portion of the tree trunk where the possum branch previously attached. Since the ride reopened with a finished, bark-textured trunk in this spot, the sudden appearance of a tarp strongly suggests that active work may be underway.While we can’t see exactly what is happening beneath the cover as we zoom past on a mine train, the current evidence suggests that crews could be preparing the trunk for work related to the missing branch. Given Disney’s earlier confirmation that the possums will return, it is possible that the tree is being modified to accommodate them while meeting the attraction’s clearance requirements.By taking the time to address the clearance issue, Disney could eventually restore these beloved critters to Frontierland without compromising guest safety. While the spinning animals haven’t been physically spotted yet, this tarp is the most promising sign we’ve had in five months that the possums could be on their way back.Why Disney World Fans Care About the Little ThingsTo the casual theme park visitor, a couple of fake possums missing from a roller coaster might sound like a trivial detail. But to the passionate Walt Disney World fan community, these are the exact details that matter most.Credit: Flickr/Joe PennistonThe “Disney Difference” is built around Imagineering and immersive storytelling. Big Thunder Mountain Railroad isn’t just a coaster built on a steel frame over a concrete slab; it’s a living, breathing story about a mining town in the American Southwest. The spinning possums, the braying donkeys, the flooded saloons, and the glowing dynamite in the caverns all work together to make you believe you are truly on the wildest ride in the wilderness.When elements go missing, the story feels just a little bit emptier. Seeing Disney address a minor visual effect removed during the refurbishment shows the effort required to maintain the detailed environments that make Disney Parks’ attractions distinctive.What’s Next for Frontierland?With the busy holiday season rapidly approaching, including Mickey’s Very Merry Christmas Party, Magic Kingdom is gearing up for a period that can bring some of the year’s highest crowd levels. Getting the possums safely reinstalled on Big Thunder Mountain Railroad before the holiday rush would be a fantastic little gift for returning fans.Credit: Theme Park Tourist, FlickrWe will be keeping a close eye on the Tumbleweed tree over the coming weeks. Once that tarp comes down and the spinning possums finally make their grand return, we will be sure to share the photos!What do you think? Are you excited to see the possums return to Big Thunder Mountain Railroad, or did you not even realize they were missing? Let us know your thoughts in the comments below, and keep checking back for the latest Walt Disney World news, updates, and construction coverage!The post Disney World is Possibly Making ANOTHER Change to Big Thunder Mountain Railroad Just Months After Massive Refurbishment appeared first on Inside the Magic.