The sequel to Tron: Legacy looks to be back on track.  Disney has been developing a follow-up to the 2010 Tron sequel for a couple of years now, though movement had slowed considerably as of late.  Apparently new Disney Studios head Alan Horn sees the sequel as a priority, with Heat Vision reporting that Jesse Wigutow being tapped to pen the latest draft of the script as development on the project moves forward “with a renewed urgency.”  Legacy director Joseph Kosinski is set to helm this next installment, though a timetable for production isn’t given.  Kosinski is currently finishing up post-production on the Tom Cruise-led sci-fi pic Oblivion.Last we heard, David DiGilio was writing a new draft of the script for Tron 3.  Legacy screenwriters Edward Kitsis and Adam Horowitz stepped back to a producer role on the follow-up given their commitment to the ABC series Once Upon a Time, which they created and run.  With this “renewed urgency” on the project, we should hear more about the sequel sooner rather than later.