It may not be opening until Spring 2021, but work is underway at the Magic Kingdom on the Tron coaster.
This photo above, shot by @wdizneew from the rooftop of the Contemporary Resort, gives a glimpse of the area that has now been cleared of trees. Fencing has been installed around the site.
In this plan, you can see the construction area referred to as MK2.
Based on the popular ride from Shanghai Disneyland, Tron is a coaster-style attraction where riders board a train of two-wheeled Lightcycles.