At the 2017 D23 Expo, Disney officially confirmed that a Tron Attraction will be added to Tomorrowland at the Magic Kingdom. The attraction is expected to be identical to Tron Lightcycle Power Run from Shanghai Disneyland and will be placed North of the Tomorrowland Speedway and next to Space Mountain.
While it does appear that the Tomorrowland Speedway will be reconfigured, it does not appear that it will be removed. Concept art shows a new pathway beginning at the Tomorrowland Light & Power Co. and extending to Storybook Circus.
While no specific date has been given, the attraction is expected to be open by 2021.
The below video of the Shanghai attraction is used with permission from the YouTube channel SoCal Attractions 360. These videos are in 4K or 1080p resolution for peak quality.
Our full Tron Lightcycle Power Run Rumor Tracker can be found here.