According to The Hollywood Reporter, Garrett Hedlund and Olivia Wilde will reprise their roles as Sam Flynn and Quorra for Tron 3.
Disney has been developing a sequel to Legacy since the movie grossed $400 million worldwide. Hedlund in 2012 said he would return to the visual-effects-heavy franchise, but that was when the project was circling a 2014 start.
The project is now looking to shoot this fall, likely in Vancouver, British Columbia. Plot details are being kept offline.
Justin Springer will be involved as a producer.
Joseph Kosinski, who directed Tron: Legacy, will also return to direct Tron 3.