I don't know that I would have needed a true dark ride. The Tron canopy seems like a reasonable fit for FW and the Tron theme seems like a reasonable means to create a Computer science featuring Tron pavilion. Then Epcot would still get its coaster draw without as much of a stretch.
Even if there's not a 100% reliable source right now, I can see it happening and wouldn't be surprised if they are. With the amount happening now with everything starting to open up like Disney Springs, City Walk, I don't see why Disney wouldn't continue on with construction at this point.
Honestly, before this was announced, I thought TT 2.0 would’ve prevented any sort of Tron ride from coming to WDW in any capacity since it has such a similar aesthetic. That being said, I come see why cloning the coaster is not completely redundant and am looking forward to the many potential benefits it’s presence can bring to Tomorrowland as a whole.