Land clearing and site prep started for Runaway Railway in June, 2019. This is a photo from November, 2019 of the prep work for the ride building before the cement foundation work began, five months after clearing began.
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Runaway Railway would not open for over 3 more years, in January, 2023. You can subtract six months off that timetable for all the Covid delays in the spring/summer of 2020, but that still gets you to a solid 3 year timeline from land clearing to ride opening for Runaway Railway.
They haven't even begun to demolish any backstage buildings, or done anything to the backstage park area at all.
All they have done so far is cut down the trees along the abandoned Lion King Tram route. At a normal pace, they will begin backstage demolition within a month or two, and that will continue through summer and into the fall.
Then comes foundation work, and actual physical construction would first begin in the winter of '27. The ride and its associated park development around it would then open by the Summer/Fall of 2029.
I don't know why you would.
The Coco ride at DCA won't open in calendar year 2028, and instead will be opening in Summer, 2029 at the earliest. But I'd bet two Churros the current
Marketing Thought Leader in the TDA Presidential suite will want to debut it in September for Day of the Dead/Halloween season and to boost off-season local visitation.