Most of the updates on a TRON: Legacy sequel (or TRON 3, whichever you prefer) from the past year have been provided by Tron himself, actor Bruce Boxleitner. The slow progress is partly due to Legacy's moderate box office success - it turned a profit, but not as much as Disney wanted - and lukewarm reception from the general moviegoing population; though, some members of the fanbase were much more pleased and have been anticipating the new installment for years now.
Legacy helmer Joseph Kosinski has been busy making the sci-fi flick Oblivion with Tom Cruise (check out the trailer), which is the other main contributing factor holding up development on another TRON. Kosinski is regarded as essentially a lock to come back for the Legacy sequel; the same goes for stars Garrett Hedlund and Olivia Wilde (should the project indeed happen, that is).
Hedlund was promoting next week's Jack Kerouac adaptation On the Road when Next Movie pressed him for details concerning the third TRON installment. The actor confirmed that he is indeed onboard, but otherwise kept quiet when it came to revealing more about the project - simply saying that "Disney's very excited. That's about that. You know, yeah, I'm very excited, Disney's very excited."
Disney is said to have put the Legacy followup on the fast-track for development, now that it has recruited Jesse Wigutow to revise the previous script draft drawn up by David DiGilio (Eight Below). Earlier this year, Boxleitner suggested that principal photography should begin sometime in 2014; although current rumors back that claim up, nothing is set in stone yet (officially, that is).
The Legacy sequel was addressed on a recent SR Underground Podcast episode, where the SR crew consensus seemed to align with the feelings of you average non-hardcore TRON fan. That is, complaints about story and content aside, Legacy does offer up enough in the way of enjoyable spectacle and dazzling effects eye candy to justify a return trip to 'The Grid'; hopefully, one that builds on the plot and character elements introduced in Legacy.
Hedlund's return indicates that could very well happen; not to mention, the door's been left wide open for Cillian Murphy (The Dark Knight Rises) to expand on his Legacy cameo and become the central antagonist in the sequel. So, all things considered, there is potential for TRON 3 to be an improvement on its predecessor.
Screen Rant will keep you posted on TRON 3 development as more information is released.
Source: Next Movie